1589 lines
40 KiB
HTML
1589 lines
40 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/edge/config/best-practices/dmarc/">
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<link rel="icon" href="../../../assets/logo/favicon-32x32.png">
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<meta name="generator" content="mkdocs-1.2.3, mkdocs-material-8.1.1">
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<title>Best Practices | DMARC - Docker Mailserver</title>
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<link rel="stylesheet" href="../../../assets/stylesheets/main.23b6d78a.min.css">
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<link rel="stylesheet" href="../../../assets/stylesheets/palette.e6a45f82.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:300,400,400i,700%7CRoboto+Mono&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_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,value]of Object.entries(palette.color))document.body.setAttribute("data-md-color-"+key,value)</script>
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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="#enabling-dmarc" class="md-skip">
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Skip to content
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<div data-md-component="announce">
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<div data-md-component="outdated" hidden>
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<aside class="md-banner md-banner--warning">
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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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<div class="md-header__ellipsis">
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<span class="md-ellipsis">
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Docker Mailserver
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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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Best Practices | DMARC
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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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<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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</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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<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" aria-label="Clear" tabindex="-1">
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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"></ol>
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</div>
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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"><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-tabs__inner 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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<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="../../setup.sh/" class="md-tabs__link md-tabs__link--active">
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Configuration
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</a>
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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 class="md-tabs__item">
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<a href="../../../contributing/issues-and-pull-requests/" class="md-tabs__link">
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Contributing
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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://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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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512"><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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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../../.." class="md-nav__link">
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Home
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<li class="md-nav__item">
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<a href="../../../introduction/" class="md-nav__link">
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Introduction
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</a>
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<li class="md-nav__item md-nav__item--active md-nav__item--nested">
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3" type="checkbox" id="__nav_3" checked>
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<label class="md-nav__link" for="__nav_3">
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Configuration
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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" aria-label="Configuration" data-md-level="1">
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<label class="md-nav__title" for="__nav_3">
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<span class="md-nav__icon md-icon"></span>
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Configuration
|
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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="../../setup.sh/" class="md-nav__link">
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Your Best Friend setup.sh
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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="../../environment/" class="md-nav__link">
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Environment Variables
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</a>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3_3" data-md-state="indeterminate" type="checkbox" id="__nav_3_3" checked>
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<label class="md-nav__link" for="__nav_3_3">
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User Management
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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" aria-label="User Management" data-md-level="2">
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<label class="md-nav__title" for="__nav_3_3">
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<span class="md-nav__icon md-icon"></span>
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User Management
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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="../../user-management/accounts/" class="md-nav__link">
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Accounts
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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="../../user-management/aliases/" class="md-nav__link">
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Aliases
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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 class="md-nav__item md-nav__item--active md-nav__item--nested">
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3_4" type="checkbox" id="__nav_3_4" checked>
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<label class="md-nav__link" for="__nav_3_4">
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Best Practices
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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" aria-label="Best Practices" data-md-level="2">
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<label class="md-nav__title" for="__nav_3_4">
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<span class="md-nav__icon md-icon"></span>
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Best Practices
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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="../dkim/" class="md-nav__link">
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DKIM
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</a>
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</li>
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<li class="md-nav__item md-nav__item--active">
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<input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
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<label class="md-nav__link md-nav__link--active" for="__toc">
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DMARC
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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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DMARC
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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="#enabling-dmarc" class="md-nav__link">
|
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Enabling DMARC
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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="../spf/" class="md-nav__link">
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SPF
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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="../autodiscover/" class="md-nav__link">
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Auto-discovery
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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" data-md-toggle="__nav_3_5" data-md-state="indeterminate" type="checkbox" id="__nav_3_5" checked>
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<label class="md-nav__link" for="__nav_3_5">
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Security
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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" aria-label="Security" data-md-level="2">
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<label class="md-nav__title" for="__nav_3_5">
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<span class="md-nav__icon md-icon"></span>
|
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Security
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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="../../security/understanding-the-ports/" class="md-nav__link">
|
|
Understanding the Ports
|
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</a>
|
|
</li>
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<li class="md-nav__item">
|
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<a href="../../security/ssl/" class="md-nav__link">
|
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SSL/TLS
|
|
</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../../security/fail2ban/" class="md-nav__link">
|
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Fail2Ban
|
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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="../../security/mail_crypt/" class="md-nav__link">
|
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Mail Encryption
|
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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" data-md-toggle="__nav_3_6" data-md-state="indeterminate" type="checkbox" id="__nav_3_6" checked>
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<label class="md-nav__link" for="__nav_3_6">
|
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Troubleshooting
|
|
<span class="md-nav__icon md-icon"></span>
|
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</label>
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|
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<nav class="md-nav" aria-label="Troubleshooting" data-md-level="2">
|
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<label class="md-nav__title" for="__nav_3_6">
|
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<span class="md-nav__icon md-icon"></span>
|
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Troubleshooting
|
|
</label>
|
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
|
|
<a href="../../troubleshooting/debugging/" class="md-nav__link">
|
|
Debugging
|
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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="../../pop3/" class="md-nav__link">
|
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Mail Delivery with POP3
|
|
</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" data-md-toggle="__nav_3_8" data-md-state="indeterminate" type="checkbox" id="__nav_3_8" checked>
|
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|
|
<label class="md-nav__link" for="__nav_3_8">
|
|
Advanced Configuration
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
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|
|
<nav class="md-nav" aria-label="Advanced Configuration" data-md-level="2">
|
|
<label class="md-nav__title" for="__nav_3_8">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Advanced Configuration
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/optional-config/" class="md-nav__link">
|
|
Optional Configuration
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item md-nav__item--nested">
|
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|
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3_8_2" data-md-state="indeterminate" type="checkbox" id="__nav_3_8_2" checked>
|
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|
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|
|
<label class="md-nav__link" for="__nav_3_8_2">
|
|
Maintenance
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
|
|
|
<nav class="md-nav" aria-label="Maintenance" data-md-level="3">
|
|
<label class="md-nav__title" for="__nav_3_8_2">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Maintenance
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
|
|
|
|
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|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/maintenance/update-and-cleanup/" class="md-nav__link">
|
|
Update and Cleanup
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
</ul>
|
|
</nav>
|
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</li>
|
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<li class="md-nav__item md-nav__item--nested">
|
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|
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3_8_3" data-md-state="indeterminate" type="checkbox" id="__nav_3_8_3" checked>
|
|
|
|
|
|
|
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|
|
<label class="md-nav__link" for="__nav_3_8_3">
|
|
Override the Default Configs
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
|
|
|
<nav class="md-nav" aria-label="Override the Default Configs" data-md-level="3">
|
|
<label class="md-nav__title" for="__nav_3_8_3">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Override the Default Configs
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/override-defaults/dovecot/" class="md-nav__link">
|
|
Dovecot
|
|
</a>
|
|
</li>
|
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<li class="md-nav__item">
|
|
<a href="../../advanced/override-defaults/postfix/" class="md-nav__link">
|
|
Postfix
|
|
</a>
|
|
</li>
|
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|
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<li class="md-nav__item">
|
|
<a href="../../advanced/override-defaults/user-patches/" class="md-nav__link">
|
|
Modifications via Script
|
|
</a>
|
|
</li>
|
|
|
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|
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|
|
</ul>
|
|
</nav>
|
|
</li>
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/auth-ldap/" class="md-nav__link">
|
|
LDAP Authentication
|
|
</a>
|
|
</li>
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/mail-sieve/" class="md-nav__link">
|
|
Email Filtering with Sieve
|
|
</a>
|
|
</li>
|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/mail-fetchmail/" class="md-nav__link">
|
|
Email Gathering with Fetchmail
|
|
</a>
|
|
</li>
|
|
|
|
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|
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<li class="md-nav__item md-nav__item--nested">
|
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|
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|
|
<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_3_8_7" data-md-state="indeterminate" type="checkbox" id="__nav_3_8_7" checked>
|
|
|
|
|
|
|
|
|
|
<label class="md-nav__link" for="__nav_3_8_7">
|
|
Email Forwarding
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
|
|
|
<nav class="md-nav" aria-label="Email Forwarding" data-md-level="3">
|
|
<label class="md-nav__title" for="__nav_3_8_7">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Email Forwarding
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
|
|
|
|
|
|
|
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|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../../advanced/mail-forwarding/relay-hosts/" class="md-nav__link">
|
|
Relay Hosts
|
|
</a>
|
|
</li>
|
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|
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<li class="md-nav__item">
|
|
<a href="../../advanced/mail-forwarding/aws-ses/" class="md-nav__link">
|
|
AWS SES
|
|
</a>
|
|
</li>
|
|
|
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|
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|
|
</ul>
|
|
</nav>
|
|
</li>
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<li class="md-nav__item">
|
|
<a href="../../advanced/full-text-search/" class="md-nav__link">
|
|
Full-Text Search
|
|
</a>
|
|
</li>
|
|
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<li class="md-nav__item">
|
|
<a href="../../advanced/kubernetes/" class="md-nav__link">
|
|
Kubernetes
|
|
</a>
|
|
</li>
|
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|
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<li class="md-nav__item">
|
|
<a href="../../advanced/ipv6/" class="md-nav__link">
|
|
IPv6
|
|
</a>
|
|
</li>
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../../advanced/podman/" class="md-nav__link">
|
|
Podman
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<p>Typically something like this should be good to start with (<em>don't forget to replace <code>@example.com</code> to your actual domain</em>):</p>
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<div class="highlight"><pre><span></span><code>_dmarc.example.com. IN TXT "v=DMARC1; p=none; rua=mailto:dmarc.report@example.com; ruf=mailto:dmarc.report@example.com; sp=none; ri=86400"
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<p>Or a bit more strict policies (<em>mind <code>p=quarantine</code> and <code>sp=quarantine</code></em>):</p>
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<div class="highlight"><pre><span></span><code>_dmarc IN TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc.report@example.com; ruf=mailto:dmarc.report@example.com; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=quarantine"
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<p>DMARC status is not being displayed instantly in Gmail for instance. If you want to check it directly after DNS entries, you can use some services around the Internet such as from <a href="https://dmarcguide.globalcyberalliance.org">Global Cyber Alliance</a> or <a href="https://ondmarc.redsift.com">RedSift</a>. In other cases, email clients will show "DMARC: PASS" in ~1 day or so.</p>
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<p>Reference: <a href="https://github.com/docker-mailserver/docker-mailserver/issues/1511">#1511</a></p>
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