Environment: Debian 10; Postfix 3.4.14; GNU Mailman 3.3.5; Mailman Core API Version 3.1; Mailman Core Python Version 3.7.3
Digging a hole after having simply created a new mailing list. This has not happened before. Steps taken:
-Created list via web interface -Added subscribers via web interface -Sent email to listname -Received error bounce:
This is the mail system at host zarathustra.ccalternatives.org.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system<Deepadaptation@lists.ccalternatives.org>: mail for lists.ccalternatives.org loops back to myself
-Added lists.ccalternatives.org to the mydestination line in /etc/postfix/main.cf and restarted Postfix -Now a new error message: <Deepadaptation@lists.ccalternatives.org>: host lists.ccalternatives.org[192.46.218.224] said: 550 5.1.1 <Deepadaptation@lists.ccalternatives.org>: Recipient address rejected: User unknown in local recipient table (in reply to RCPT TO command)