I then tried to send email to the list. It failed:
This is the Postfix program at host m21.unixathome.org.
I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The Postfix program
<email@example.com>: host lists.example.org[18.104.22.168]
said: 550 <firstname.lastname@example.org>: Recipient address
rejected: User unknown in virtual alias table (in reply to RCPT TO command)
Ahh yes, of course, I didn't tell Postfix about this new domain it must handle.
To fix the above, I added this entry to
After making any changes to this file, you need to refresh the database:
I also let Postfix know that it should accept mail for lists.freshports.org
by adding this entry to
relay_domains = lists.freebsddiary.org, lists.freshports.org
If you already have a
relay_domains entry, add to it. Do not replace.
With that change, mail for that mailing list worked!