32 lines
1.5 KiB
Markdown
32 lines
1.5 KiB
Markdown
### User-defined sieve filters
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[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.
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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.
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It's even possible to install a user provided Sieve filter at startup during users setup: simply include a Sieve file in the `config `path for each user login that need a filter. The file name provided should be in the form **\<user_login\>.dovecot.sieve**, so for example for `user1@domain.tld` you should provide a Sieve file named `config/user1@domain.tld.dovecot.sieve`.
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An example of a sieve filter that moves mails to a folder `INBOX/spam` depending on the sender address:
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```
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require ["fileinto", "reject"];
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if address :contains ["From"] "spam@spam.com" {
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fileinto "INBOX.spam";
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} else {
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keep;
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}
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```
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***Note:*** that folders have to exist beforehand if sieve should move them.
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Another example of a sieve filter that forward mails to a different address:
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```
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require ["copy"];
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redirect :copy "user2@otherdomain.tld";
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```
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For more examples or a detailed description of the Sieve language have a look at [the official site](http://sieve.info/examplescripts). Other resources are available on the internet where you can find several [examples](https://support.tigertech.net/sieve#sieve-example-rules-jmp). |