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Updated Configure Sieve filters (markdown)

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17Halbe 2018-04-18 15:31:34 +02:00
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docs/content/advanced/mail-sieve.md
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### User-defined sieve filters
[Sieve](http://sieve.info/) allows to specify filtering rules for incoming emails that allow for example sorting mails into different folders depending on the title of an email.
There are global and user specific filters which are filtering the incoming emails in the following order:
- Global-before -> User specific -> Global-after
Global filters are applied to EVERY incoming mail for EVERY email address.
To specify a global Sieve filter provide a `config/before.dovecot.sieve` or a `config/after.dovecot.sieve` file with your filter rules.
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.)
To specify a user-defined Sieve filter place a `.dovecot.sieve` file into a virtual user's mail folder e.g. `/var/mail/domain.com/user1/.dovecot.sieve`. If this file exists dovecot will apply the filtering rules.