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Aditya K
Asked: 2014-06-26 01:58:38 +0800 CST

Postfix: What does orig_to mean when using virtual_alias_domains?

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I'm running a postfix server with the primary domain being domainA.com (configured in mydestination)

There is a second domain, domainB.com configured under virtual_alias_domains

I have user accounts for domainB.com mapped using virtual_alias_maps like this:

[email protected]          user

Now, when I receive mail for an account [email protected] I'm seeing log entries in maillog like:

Jun 23 17:51:39 mailhost postfix/pipe[8892]: 415BD41671: **to=<[email protected]>, orig_to=<[email protected]>**, relay=spamassassin, delay=1.5, delays=0.74/0.01/0/0.7, dsn=2.0.0, status=sent (delivered via spamassassin service)

My question is: Is this normal behaviour? Why the translation in domain?

postfix

1 Answers

  1. Best Answer

    The short answer: YES. Maillog entry indicated normal behavior of postfix.

    Explanation:

    In your virtual_alias_maps table you put 

    [email protected]          user

    Here postfix rewriting engine works

    1. You send email to [email protected]
    2. Because postfix find [email protected] user in your virtual_alias_maps table, postfix will rewrite email destination [email protected] -> user
    3. In the right entry, you don't put any domain (e.g. you just put user). By default postfix will append this email address became user@$myorigin. This behavior controlled by append_at_myorigin parameter. Variable $myorigin controlled by myorigin parameter.
    4. In your case, looks like append_at_myorigin is set to yes and myorigin is set to domainA.com
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