2097 lines
51 KiB
HTML
2097 lines
51 KiB
HTML
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<!doctype html>
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<html lang="en" class="no-js">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<meta name="description" content="A fullstack but simple mail-server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) using Docker.">
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<meta name="author" content="docker-mailserver (Github Organization)">
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<link rel="canonical" href="https://docker-mailserver.github.io/docker-mailserver/latest/config/advanced/mail-sieve/">
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<link rel="prev" href="../auth-ldap/">
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<link rel="next" href="../mail-fetchmail/">
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<link rel="icon" href="../../../assets/logo/favicon-32x32.png">
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<meta name="generator" content="mkdocs-1.5.2, mkdocs-material-9.2.8">
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<title>Advanced | Email Filtering with Sieve - Docker Mailserver</title>
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<link rel="stylesheet" href="../../../assets/stylesheets/main.046329b4.min.css">
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<link rel="stylesheet" href="../../../assets/stylesheets/palette.85d0ee34.min.css">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
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<style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>
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<link rel="stylesheet" href="../../../assets/css/customizations.css">
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<script>__md_scope=new URL("../../..",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
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</head>
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<body dir="ltr" data-md-color-scheme="default" data-md-color-primary="indigo" data-md-color-accent="indigo">
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<script>var palette=__md_get("__palette");if(palette&&"object"==typeof palette.color)for(var key of Object.keys(palette.color))document.body.setAttribute("data-md-color-"+key,palette.color[key])</script>
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<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
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<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
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<label class="md-overlay" for="__drawer"></label>
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<div data-md-component="skip">
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<a href="#user-defined-sieve-filters" class="md-skip">
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Skip to content
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</a>
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<div data-md-component="announce">
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</div>
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<div data-md-color-scheme="default" data-md-component="outdated" hidden>
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</div>
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<header class="md-header" data-md-component="header">
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<nav class="md-header__inner md-grid" aria-label="Header">
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<a href="../../.." title="Docker Mailserver" class="md-header__button md-logo" aria-label="Docker Mailserver" data-md-component="logo">
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<img src="../../../assets/logo/dmo-logo-white.min.svg" alt="logo">
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</a>
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<label class="md-header__button md-icon" for="__drawer">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z"/></svg>
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</label>
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<div class="md-header__title" data-md-component="header-title">
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<div class="md-header__ellipsis">
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<div class="md-header__topic">
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<span class="md-ellipsis">
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Docker Mailserver
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</span>
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</div>
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<div class="md-header__topic" data-md-component="header-topic">
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<span class="md-ellipsis">
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Advanced | Email Filtering with Sieve
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</span>
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</div>
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<form class="md-header__option" data-md-component="palette">
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<input class="md-option" data-md-color-media="(prefers-color-scheme: light)" data-md-color-scheme="default" data-md-color-primary="indigo" data-md-color-accent="indigo" aria-label="Switch to dark mode" type="radio" name="__palette" id="__palette_1">
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<label class="md-header__button md-icon" title="Switch to dark mode" for="__palette_2" hidden>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m17.75 4.09-2.53 1.94.91 3.06-2.63-1.81-2.63 1.81.91-3.06-2.53-1.94L12.44 4l1.06-3 1.06 3 3.19.09m3.5 6.91-1.64 1.25.59 1.98-1.7-1.17-1.7 1.17.59-1.98L15.75 11l2.06-.05L18.5 9l.69 1.95 2.06.05m-2.28 4.95c.83-.08 1.72 1.1 1.19 1.85-.32.45-.66.87-1.08 1.27C15.17 23 8.84 23 4.94 19.07c-3.91-3.9-3.91-10.24 0-14.14.4-.4.82-.76 1.27-1.08.75-.53 1.93.36 1.85 1.19-.27 2.86.69 5.83 2.89 8.02a9.96 9.96 0 0 0 8.02 2.89m-1.64 2.02a12.08 12.08 0 0 1-7.8-3.47c-2.17-2.19-3.33-5-3.49-7.82-2.81 3.14-2.7 7.96.31 10.98 3.02 3.01 7.84 3.12 10.98.31Z"/></svg>
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</label>
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<input class="md-option" data-md-color-media="(prefers-color-scheme: dark)" data-md-color-scheme="slate" data-md-color-primary="indigo" data-md-color-accent="blue" aria-label="Switch to light mode" type="radio" name="__palette" id="__palette_2">
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<label class="md-header__button md-icon" title="Switch to light mode" for="__palette_1" hidden>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 7a5 5 0 0 1 5 5 5 5 0 0 1-5 5 5 5 0 0 1-5-5 5 5 0 0 1 5-5m0 2a3 3 0 0 0-3 3 3 3 0 0 0 3 3 3 3 0 0 0 3-3 3 3 0 0 0-3-3m0-7 2.39 3.42C13.65 5.15 12.84 5 12 5c-.84 0-1.65.15-2.39.42L12 2M3.34 7l4.16-.35A7.2 7.2 0 0 0 5.94 8.5c-.44.74-.69 1.5-.83 2.29L3.34 7m.02 10 1.76-3.77a7.131 7.131 0 0 0 2.38 4.14L3.36 17M20.65 7l-1.77 3.79a7.023 7.023 0 0 0-2.38-4.15l4.15.36m-.01 10-4.14.36c.59-.51 1.12-1.14 1.54-1.86.42-.73.69-1.5.83-2.29L20.64 17M12 22l-2.41-3.44c.74.27 1.55.44 2.41.44.82 0 1.63-.17 2.37-.44L12 22Z"/></svg>
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</label>
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</form>
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<label class="md-header__button md-icon" for="__search">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
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</label>
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<div class="md-search" data-md-component="search" role="dialog">
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<label class="md-search__overlay" for="__search"></label>
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<div class="md-search__inner" role="search">
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<form class="md-search__form" name="search">
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<input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
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</label>
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<nav class="md-search__options" aria-label="Search">
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<button type="reset" class="md-search__icon md-icon" title="Clear" aria-label="Clear" tabindex="-1">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
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</button>
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</nav>
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</form>
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<div class="md-search__output">
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<div class="md-search__scrollwrap" data-md-scrollfix>
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<div class="md-search-result" data-md-component="search-result">
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<div class="md-search-result__meta">
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Initializing search
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</div>
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<ol class="md-search-result__list" role="presentation"></ol>
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</div>
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<div class="md-header__source">
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<a href="https://github.com/docker-mailserver/docker-mailserver" title="Go to repository" class="md-source" data-md-component="source">
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<div class="md-source__icon md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512"><!--! Font Awesome Free 6.4.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M165.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6zm-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3zm44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9zM244.8 8C106.1 8 0 113.3 0 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8zM97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1zm-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7zm32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1zm-11.4-14.7c-1.6 1-1.6 3.6 0 5.9 1.6 2.3 4.3 3.3 5.6 2.3 1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2z"/></svg>
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</div>
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<div class="md-source__repository">
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docker-mailserver
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</div>
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</a>
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</div>
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</nav>
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</header>
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<div class="md-container" data-md-component="container">
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<nav class="md-tabs" aria-label="Tabs" data-md-component="tabs">
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<div class="md-grid">
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<ul class="md-tabs__list">
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<li class="md-tabs__item">
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<a href="../../.." class="md-tabs__link">
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Home
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</a>
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<li class="md-tabs__item">
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<a href="../../../introduction/" class="md-tabs__link">
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Introduction
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</a>
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<li class="md-tabs__item">
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<a href="../../../usage/" class="md-tabs__link">
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Usage
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</a>
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</li>
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<li class="md-tabs__item md-tabs__item--active">
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<a href="../../environment/" class="md-tabs__link">
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Configuration
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</a>
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</li>
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<li class="md-tabs__item">
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<a href="../../../examples/tutorials/basic-installation/" class="md-tabs__link">
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Examples
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</a>
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<li class="md-tabs__item">
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<a href="../../../faq/" class="md-tabs__link">
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FAQ
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</a>
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</li>
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<li class="md-tabs__item">
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<a href="../../../contributing/general/" class="md-tabs__link">
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Contributing
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</a>
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<li class="md-tabs__item">
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<a href="https://hub.docker.com/r/mailserver/docker-mailserver/" class="md-tabs__link">
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DockerHub
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</a>
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</li>
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<li class="md-tabs__item">
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<a href="https://github.com/docker-mailserver/docker-mailserver/pkgs/container/docker-mailserver" class="md-tabs__link">
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GHCR
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</a>
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</li>
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</ul>
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</div>
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</nav>
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<main class="md-main" data-md-component="main">
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<div class="md-main__inner md-grid">
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<div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
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<div class="md-sidebar__scrollwrap">
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<div class="md-sidebar__inner">
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<nav class="md-nav md-nav--primary md-nav--lifted" aria-label="Navigation" data-md-level="0">
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<label class="md-nav__title" for="__drawer">
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<a href="../../.." title="Docker Mailserver" class="md-nav__button md-logo" aria-label="Docker Mailserver" data-md-component="logo">
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<img src="../../../assets/logo/dmo-logo-white.min.svg" alt="logo">
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</a>
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Docker Mailserver
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</label>
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<div class="md-nav__source">
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<a href="https://github.com/docker-mailserver/docker-mailserver" title="Go to repository" class="md-source" data-md-component="source">
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<div class="md-source__icon md-icon">
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<span class="md-ellipsis">
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Email Filtering with Sieve
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<a href="./" class="md-nav__link md-nav__link--active">
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<span class="md-ellipsis">
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Email Filtering with Sieve
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</span>
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</a>
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
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<label class="md-nav__title" for="__toc">
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<span class="md-nav__icon md-icon"></span>
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Table of contents
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</label>
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<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="#user-defined-sieve-filters" class="md-nav__link">
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User-Defined Sieve Filters
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#automatic-sorting-based-on-subaddresses" class="md-nav__link">
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Automatic Sorting Based on Subaddresses
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#manage-sieve" class="md-nav__link">
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Manage Sieve
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../mail-fetchmail/" class="md-nav__link">
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<span class="md-ellipsis">
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Email Gathering with Fetchmail
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../mail-getmail/" class="md-nav__link">
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<span class="md-ellipsis">
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Email Gathering with Getmail
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<label class="md-nav__link" for="__nav_4_8_8" id="__nav_4_8_8_label" tabindex="0">
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<span class="md-ellipsis">
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Email Forwarding
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_8_8_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_4_8_8">
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<span class="md-nav__icon md-icon"></span>
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Email Forwarding
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../mail-forwarding/relay-hosts/" class="md-nav__link">
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<span class="md-ellipsis">
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Relay Hosts
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../mail-forwarding/aws-ses/" class="md-nav__link">
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<span class="md-ellipsis">
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AWS SES
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../full-text-search/" class="md-nav__link">
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<span class="md-ellipsis">
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Full-Text Search
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../kubernetes/" class="md-nav__link">
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<span class="md-ellipsis">
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Kubernetes
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../ipv6/" class="md-nav__link">
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<span class="md-ellipsis">
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IPv6
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../podman/" class="md-nav__link">
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<span class="md-ellipsis">
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Podman
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../dovecot-master-accounts/" class="md-nav__link">
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<span class="md-ellipsis">
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Dovecot Master Accounts
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_5" >
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<label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0">
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<span class="md-ellipsis">
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Examples
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_5_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_5">
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<span class="md-nav__icon md-icon"></span>
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Examples
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_5_1" >
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<label class="md-nav__link" for="__nav_5_1" id="__nav_5_1_label" tabindex="0">
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<span class="md-ellipsis">
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Tutorials
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_5_1_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_5_1">
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<span class="md-nav__icon md-icon"></span>
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Tutorials
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../../../examples/tutorials/basic-installation/" class="md-nav__link">
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<span class="md-ellipsis">
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Basic Installation
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/tutorials/mailserver-behind-proxy/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Mailserver behind Proxy
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/tutorials/crowdsec/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Crowdsec
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/tutorials/docker-build/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Building your own Docker image
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/tutorials/blog-posts/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Blog Posts
|
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</span>
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</a>
|
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_5_2" >
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<label class="md-nav__link" for="__nav_5_2" id="__nav_5_2_label" tabindex="0">
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<span class="md-ellipsis">
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Use Cases
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_5_2_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_5_2">
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<span class="md-nav__icon md-icon"></span>
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Use Cases
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
|
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<a href="../../../examples/use-cases/forward-only-mailserver-with-ldap-authentication/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Forward-Only Mail-Server with LDAP
|
|
</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../../../examples/use-cases/imap-folders/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Customize IMAP Folders
|
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</span>
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</a>
|
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/use-cases/ios-mail-push-support/" class="md-nav__link">
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<span class="md-ellipsis">
|
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iOS Mail Push Support
|
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</span>
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</a>
|
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</li>
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<li class="md-nav__item">
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<a href="../../../examples/use-cases/auth-lua/" class="md-nav__link">
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<span class="md-ellipsis">
|
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Lua Authentication
|
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../../../faq/" class="md-nav__link">
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<span class="md-ellipsis">
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FAQ
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_7" >
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<span class="md-ellipsis">
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Contributing
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</span>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_7">
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<span class="md-nav__icon md-icon"></span>
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Contributing
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../../../contributing/general/" class="md-nav__link">
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<span class="md-ellipsis">
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General Information
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../contributing/tests/" class="md-nav__link">
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<span class="md-ellipsis">
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Tests
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../contributing/issues-and-pull-requests/" class="md-nav__link">
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<span class="md-ellipsis">
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Issues and Pull Requests
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</span>
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
|
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<a href="https://hub.docker.com/r/mailserver/docker-mailserver/" class="md-nav__link">
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<span class="md-ellipsis">
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DockerHub
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="https://github.com/docker-mailserver/docker-mailserver/pkgs/container/docker-mailserver" class="md-nav__link">
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|
<span class="md-ellipsis">
|
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GHCR
|
|
</span>
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</a>
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</li>
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</ul>
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</nav>
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</div>
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</div>
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</div>
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<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
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<div class="md-sidebar__scrollwrap">
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<div class="md-sidebar__inner">
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
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Table of contents
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<li class="md-nav__item">
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<a href="#user-defined-sieve-filters" class="md-nav__link">
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User-Defined Sieve Filters
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#automatic-sorting-based-on-subaddresses" class="md-nav__link">
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Automatic Sorting Based on Subaddresses
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#manage-sieve" class="md-nav__link">
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Manage Sieve
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</a>
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</li>
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</ul>
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</nav>
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<a href="https://github.com/docker-mailserver/docker-mailserver/edit/master/docs/content/config/advanced/mail-sieve.md" title="Edit this page" class="md-content__button md-icon">
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</a>
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<h1>Email Filtering with Sieve</h1>
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<h2 id="user-defined-sieve-filters"><a class="toclink" href="#user-defined-sieve-filters">User-Defined Sieve Filters</a></h2>
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<p><a href="http://sieve.info/">Sieve</a> allows to specify filtering rules for incoming emails that allow for example sorting mails into different folders depending on the title of an email.
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There are global and user specific filters which are filtering the incoming emails in the following order:</p>
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<ul>
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<li>Global-before -> User specific -> Global-after</li>
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</ul>
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<p>Global filters are applied to EVERY incoming mail for EVERY email address.
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To specify a global Sieve filter provide a <code>docker-data/dms/config/before.dovecot.sieve</code> or a <code>docker-data/dms/config/after.dovecot.sieve</code> file with your filter rules.
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If any filter in this filtering chain discards an incoming mail, the delivery process will stop as well and the mail will not reach any following filters (e.g. global-before stops an incoming spam mail: The mail will get discarded and a user-specific filter won't get applied.)</p>
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<p>To specify a user-defined Sieve filter place a <code>.dovecot.sieve</code> file into a virtual user's mail folder (e.g. <code>/var/mail/example.com/user1/home/.dovecot.sieve</code>). If this file exists dovecot will apply the filtering rules.</p>
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<p>It's even possible to install a user provided Sieve filter at startup during users setup: simply include a Sieve file in the <code>docker-data/dms/config/</code> path for each user login that needs a filter. The file name provided should be in the form <code><user_login>.dovecot.sieve</code>, so for example for <code>user1@example.com</code> you should provide a Sieve file named <code>docker-data/dms/config/user1@example.com.dovecot.sieve</code>.</p>
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<p>An example of a sieve filter that moves mails to a folder <code>INBOX/spam</code> depending on the sender address:</p>
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<div class="admonition example">
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<p class="admonition-title">Example</p>
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<div class="highlight"><pre><span></span><code><span class="kn">require</span> <span class="p">[</span><span class="s">"fileinto"</span><span class="p">,</span> <span class="s">"reject"</span><span class="p">];</span>
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<span class="nb">if</span> <span class="nb">address</span> <span class="nt">:contains</span> <span class="p">[</span><span class="s">"From"</span><span class="p">]</span> <span class="s">"spam@spam.com"</span> <span class="p">{</span>
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<span class="nb">fileinto</span> <span class="s">"INBOX.spam"</span><span class="p">;</span>
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<span class="p">}</span> <span class="nb">else</span> <span class="p">{</span>
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<span class="nb">keep</span><span class="p">;</span>
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<span class="p">}</span>
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</code></pre></div>
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</div>
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<div class="admonition warning">
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<p class="admonition-title">Warning</p>
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<p>That folders have to exist beforehand if sieve should move them.</p>
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</div>
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<p>Another example of a sieve filter that forward mails to a different address:</p>
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<div class="admonition example">
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<p class="admonition-title">Example</p>
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<div class="highlight"><pre><span></span><code><span class="kn">require</span> <span class="p">[</span><span class="s">"copy"</span><span class="p">];</span>
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<span class="nb">redirect</span> <span class="nt">:copy</span> <span class="s">"user2@not-example.com"</span><span class="p">;</span>
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</code></pre></div>
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</div>
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<p>Just forward all incoming emails and do not save them locally:</p>
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<div class="admonition example">
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<p class="admonition-title">Example</p>
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<div class="highlight"><pre><span></span><code><span class="nb">redirect</span> <span class="s">"user2@not-example.com"</span><span class="p">;</span>
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</code></pre></div>
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</div>
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<p>You can also use external programs to filter or pipe (process) messages by adding executable scripts in <code>docker-data/dms/config/sieve-pipe</code> or <code>docker-data/dms/config/sieve-filter</code>. This can be used in lieu of a local alias file, for instance to forward an email to a webservice. These programs can then be referenced by filename, by all users. Note that the process running the scripts run as a privileged user. For further information see <a href="https://wiki.dovecot.org/Pigeonhole/Sieve/Plugins/Pipe">Dovecot's wiki</a>.</p>
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<div class="highlight"><pre><span></span><code><span class="kn">require</span> <span class="p">[</span><span class="s">"vnd.dovecot.pipe"</span><span class="p">];</span>
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<span class="err">pipe</span> <span class="s">"external-program"</span><span class="p">;</span>
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</code></pre></div>
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<p>For more examples or a detailed description of the Sieve language have a look at <a href="http://sieve.info/examplescripts">the official site</a>. Other resources are available on the internet where you can find several <a href="https://support.tigertech.net/sieve#sieve-example-rules-jmp">examples</a>.</p>
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<h2 id="automatic-sorting-based-on-subaddresses"><a class="toclink" href="#automatic-sorting-based-on-subaddresses">Automatic Sorting Based on Subaddresses</a></h2>
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<p>It is possible to sort subaddresses such as <code>user+mailing-lists@example.com</code> into a corresponding folder (here: <code>INBOX/Mailing-lists</code>) automatically.</p>
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<div class="highlight"><pre><span></span><code><span class="kn">require</span> <span class="p">[</span><span class="s">"envelope"</span><span class="p">,</span> <span class="s">"fileinto"</span><span class="p">,</span> <span class="s">"mailbox"</span><span class="p">,</span> <span class="s">"subaddress"</span><span class="p">,</span> <span class="s">"variables"</span><span class="p">];</span>
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<span class="nb">if</span> <span class="nb">envelope</span> <span class="nt">:detail</span> <span class="nt">:matches</span> <span class="s">"to"</span> <span class="s">"*"</span> <span class="p">{</span>
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<span class="kd">set</span> <span class="nt">:lower</span> <span class="nt">:upperfirst</span> <span class="s">"tag"</span> <span class="s">"${1}"</span><span class="p">;</span>
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<span class="nb">if</span> <span class="err">mailbox</span><span class="nb">exists</span> <span class="s">"INBOX.${1}"</span> <span class="p">{</span>
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<span class="nb">fileinto</span> <span class="s">"INBOX.${1}"</span><span class="p">;</span>
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<span class="p">}</span> <span class="nb">else</span> <span class="p">{</span>
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<span class="nb">fileinto</span> <span class="nt">:create</span> <span class="s">"INBOX.${tag}"</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre></div>
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<h2 id="manage-sieve"><a class="toclink" href="#manage-sieve">Manage Sieve</a></h2>
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<p>The <a href="https://doc.dovecot.org/admin_manual/pigeonhole_managesieve_server/">Manage Sieve</a> extension allows users to modify their Sieve script by themselves. The authentication mechanisms are the same as for the main dovecot service. ManageSieve runs on port <code>4190</code> and needs to be enabled using the <code>ENABLE_MANAGESIEVE=1</code> environment variable.</p>
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<div class="admonition example">
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<p class="admonition-title">Example</p>
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<div class="highlight"><pre><span></span><code><span class="c1"># compose.yaml</span>
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<span class="nt">ports</span><span class="p">:</span>
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<span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="s">"4190:4190"</span>
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<span class="nt">environment</span><span class="p">:</span>
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<span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ENABLE_MANAGESIEVE=1</span>
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</code></pre></div>
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</div>
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<p>All user defined sieve scripts that are managed by ManageSieve are stored in the user's home folder in <code>/var/mail/example.com/user1/home/sieve</code>. Just one Sieve script might be active for a user and is sym-linked to <code>/var/mail/example.com/user1/home/.dovecot.sieve</code> automatically.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>ManageSieve makes sure to not overwrite an existing <code>.dovecot.sieve</code> file. If a user activates a new sieve script the old one is backed up and moved to the <code>sieve</code> folder.</p>
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</div>
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<p>The extension is known to work with the following ManageSieve clients:</p>
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<ul>
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<li><strong><a href="https://github.com/thsmi/sieve">Sieve Editor</a></strong> a portable standalone application based on the former Thunderbird plugin.</li>
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<li><strong><a href="https://kontact.kde.org/components/kmail/">Kmail</a></strong> the mail client of <a href="https://kde.org/">KDE</a>'s Kontact Suite.</li>
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