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Postfix Unknown Recipients Getting Greylisted

August 9th, 2007

My postfix logs were reporting that mail sent to non-existent was getting greylisted. I would expect this mail to get rejected right away, so I dug up the reason why it wasn't. Turns out I only had the virtual domains getting checked, not the mailboxes. So I added this line back in (I had commented it out for simplicity!):

virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-homedirs.cf

As explained in the docs, virtualmailboxmaps is an optional setting:

http://www.postfix.org/postconf.5.html#virtualmailboxmaps

Recipient address rejected: User unknown in virtual mailbox table;
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