Question Mailman works but doesn't send nor receive mail

[ChananZ]

Our Mailman used to work properly for more than a year. Yesterday we noticed mail sent to mailman is not being accepted. The log reads:
"No such user 'list@example.org' in mail authorization database".
The same error occurs for all the mailing list aliases.
We tried to "genaliases" but this didn't have any positive results.
Our guess is that Plesk updates have overwritten some configurations.

Switching the mailing lists (we have two) OFF and ON did not help either.
We'd appreciate if you could offer a clue.

Thanks.

 

[IgorG]

Try to fix it with

# plesk repair mail

 

[ChananZ]

Thanks Igor,
We tried to do just that yesterday. To no avail.
Log messages continue to tell us no such user exists in mail authorization database.