Mailboxes disabled after upgraded to squeeze.
I've just upgraded my server from Lenny to Squeeze (from the OVH release).
Everything went good except one thing : All the mailboxes were disabled but well ticked in the ispconfig interface.
The error came from POP accounts, with thunderbird and with IMAP accounts from roundcube.
That's what I did : I untick the "enable mailbox", I saved, I tick the "enable mailbox", and Saved again.
Then the mailboxes worked perfectly.
I just wanted to tell you that and I don't know if there's a bug about it, but if it can help someone ...