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Asked: 2012-10-06 10:58:42 +0800 CST

Redirecting wildcard email to one email with postfix

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I'm creating a bounce email system where addressees can reply to messages on my site.

However when the email are sent to the user containing the previous message, the Reply-To field contains an address like this [email protected] (which contains the ID at the end).

If the user replies, the reply message will be sent back to [email protected] which of course, doesn't have its own mailbox, except the [email protected].

How would I redirect all incoming messages coming from a specific wildcard notification-message-*@mysite.com to [email protected]? I did some research, but no solid part worked, including the luser_relay = [email protected] and putting notification-message-* in the postfix aliases table, the notification@ has a Maildir, so the mail would go into it.

A concept diagram:

enter image description here

I am using Ubuntu 11.04.

email

4 Answers

  1. As have said mschuett, you can use regexp

    First check that postfix supports regexp:

    root @ mail / #  postconf -m | grep regexp
regexp

    Create the file /etc/postfix/aliases-regexp and add to it your regexp

    root @ mail / #  cat /etc/postfix/aliases-regexp
/notification-message-[0-9]+@example\.net/ [email protected]

    Run postmap and check whether it works:

    root @ mail / #  postmap /etc/postfix/aliases-regexp
root @ mail / #  postmap -q [email protected] regexp:/etc/postfix/aliases-regexp
[email protected]

    If everything is OK, add this file to your alias database

    Example:

    root @ mail / #  cat /etc/postfix/main.cf | grep ^alias_maps
alias_maps = hash:/etc/aliases regexp:/etc/postfix/aliases-regexp

    If you are using virtual domains, add this file to your virtual_alias_maps

    Example:

    root @ mail / #  cat /etc/postfix/main.cf | grep ^virtual_alias_maps
virtual_alias_maps = mysql:/etc/postfix/mysql/alias.conf regexp:/etc/postfix/aliases-regexp

    Do not forget to restart postfix.

    Good luck!

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  2. Alias maps (virtual, local, ...) will work in combination with the regexp_table format. But if you have compiled in PCRE, then you can also use the pcre_table format.

    Otherwise you should search for "Postfix catch-all" which is a bit more greedy.

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  3. Best Answer

    I'd be inclined to solve this using recipient_delimiter.

    If you don't mind using slightly different Reply-To addresses, you can set:

    recipient_delimiter = +

    in your config, and then mail to e.g. [email protected] (note the +) will be delivered to the notification user (assuming there are no more-specific rules/users matching notification+message-988742).

    You could try setting recipient_delimiter = - (so that you could use the Reply-To headers as they are in the question) but I'm not sure how that would work with multiple instances of the delimiter on the left-hand side, and I don't have a Postfix to hand to check.

    • 2

  4. Create a rule using "with specific words in the sender's address." It will accept multiple words as "or" but I don't see how to do it with an "and." Perhaps this gets you far enough.

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