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I thought I understood "Alias domains" as that it's simply an alias for another domain! So when I set up a mailbox like "info@main.com", and add "alias.com" as a domain alias for "main.com" the address "info@alias.com" would also work... But no!

So, I've added these domains:

  • main.com
  • alias.com

I've created this mailbox:

  • info@main.com

Then I mapped these alias domains:

  • alias.com => main.com

And then when I send a mail to info@alias.com I receive this error:

Recipient address rejected: User unknown in virtual mailbox table (state 13).

I don't want to create an alias for every domain, as I have a few. I also don't want to use a wildcard (like info@*) because there are also other domains that aren't aliases of main.com

So... what are these exactly?

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I expected the same and still don't understand why that's not the case. –  Josh M. Jan 26 at 21:12

2 Answers 2

up vote 3 down vote accepted

The explanation is in the documentation: http://www.postfix.org/VIRTUAL_README.html#virtual_alias

You want "alias mailboxes" aka virtual_mailbox_alias and virtual_mailbox_maps but talk about "alias domains": http://www.postfix.org/ADDRESS_CLASS_README.html#virtual_alias_class

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I can't seem to make sense of the docs - how do you have domain1.com alias any mailbox to <mailbox>@domain2.com? –  Josh M. Jan 26 at 21:16

@Josh M.

I have no idea whether this is the right way and/or good practice but I'm using something like this:

virtual_alias_maps = regexp:/etc/postfix/domain_rewriting pgsql:/etc/postfix/pgsql/     virtual_alias_maps.cf

$ cat /etc/postfix/domain_rewriting 
/^(.*)@domain1.com$/     ${1}@domain2.com
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