Let me explain the situation:

We have a customer who is primarly using us to host their mailing lists which add up to 16 mailman lists.

His account has been all well, and then we moved the account to a newer server using the copy account function.
Since then, one of his mailman lists isn't working at all, but the rest are ok.

I checked valiases - seemed ok. I checked /usr/local/cpanel/3rdparty/mailman/ and the list is there and all. I logged on to his list admin and things seemed ok there - he's got 155 users on that single list.

Sending to the list does not provide any error - but the mail never seems to reach the archives or anything really. It is as if it never was sent to the list.

cPanel is currently running 9.2.0 S25

Any help/tips are greatly apprectiated!