- Plesk Onyx for Linux
Emails sent to a Mailman mailing list return the following error:
PLESK_INFO: Hi. This is the qmail-send program at example.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. firstname.lastname@example.org: Sorry, no mailbox here by that name. (#5.1.1)
Corrupted Mailman installation.
Login to Plesk via SSH
Restore Mailman Mailing list default settings with the following command:
Warning: The command execution can cause downtime for Mail services.
Warning: All customized settings of mailboxes, Postfix/Qmail configuration files will be returned to default ones.