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47 lines
2.1 KiB
Markdown
47 lines
2.1 KiB
Markdown
Please first read [Postfix documentation on virtual aliases](http://www.postfix.org/VIRTUAL_README.html#virtual_alias).
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### Configuring aliases
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You can use [setup.sh](https://github.com/tomav/docker-mailserver/wiki/Setup-docker-mailserver-using-the-script-setup.sh#alias) instead of creating and editing files manually.
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Aliases are managed in `/tmp/docker-mailserver/postfix-virtual.cf`.
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An alias is a _full_ email address that will either be:
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* delivered to an existing account registered in `/tmp/docker-mailserver/postfix-accounts.cf`
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* redirected to one or more other email addresses
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Alias and target are space separated.
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Example (on a server with domain.tld as its domain):
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# Alias delivered to an existing account
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alias1@domain.tld user1@domain.tld
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# Alias forwarded to an external email address
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alias2@domain.tld external@gmail.com
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### Configuring regexp aliases
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Additional regexp aliases can be configured by placing them into `config/postfix-regexp.cf`. The regexp aliases get evaluated after the virtual aliases (`/tmp/docker-mailserver/postfix-virtual.cf`).
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For example, the following `config/postfix-regexp.cf` causes all email to "test" users to be delivered to qa@example.com:
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```
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/^test[0-9][0-9]*@example.com/ qa@example.com
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```
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### Address tags (extension delimiters) as an alternative to aliases
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Postfix supports so-called address tags, in the form of plus (+) tags - i.e. address+tag@example.com will end up at address@example.com.
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This is configured by default and the (configurable !) separator is set to `+`.
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For more info, see [How to use Address Tagging (user+tag@example.com) with Postfix](https://www.stevejenkins.com/blog/2011/03/how-to-use-address-tagging-usertagexample-com-with-postfix/) and the [official documentation](http://www.postfix.org/postconf.5.html#recipient_delimiter).
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Note that if you do decide to change the configurable separator, you must add the same line to *both* `config/postfix-main.cf` and `config/dovecot.cf`, because Dovecot is acting as the delivery agent. For example, to switch to `-`, add:
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```
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recipient_delimiter = -
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```
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