Mailboxes of two domains not found

[CGI1979]

Dear Plesk Forum,

unfortunately today the mailboxes of two domains were "gone".
The mailbox was still there physically but no mails would be delivered into the mailbox, nor could the user connect to it.

The log said:

Apr 20 07:22:11 plesk dovecot_authdb_plesk[30678]: No such user '[email protected]' in mail authorization database

Apr 20 07:22:11 plesk dovecot: auth: Debug: master in: USER#0111#[email protected]#011service=lda

Apr 20 07:22:11 plesk dovecot: auth: plesk([email protected]): Mail account information for user='[email protected]' was not found

Apr 20 07:22:11 plesk dovecot: auth: Debug: userdb out: NOTFOUND#0111

Apr 20 07:22:11 plesk postfix/pipe[27105]: 7DD5F5DA02D: to=<[email protected]>, relay=plesk_virtual, delay=90585, delays=90585/0/0/0.03, dsn=4.2.1, status=deferred (Message can not be delivered at this tim$

The only solution that worked for me was to delete the mailbox, create it again and copy the old mails back.
That problem only occured in two cases (two domains of one customer). All his other domains worked like a charm and no other customer was affected.

Does anyone have a clue how this could happen and how to avaid that scenario?

 

[IgorG]

Please check these KB articles:

http://kb.odin.com/en/118656
http://kb.odin.com/en/5780

I hope it will help.

 

[CGI1979]

5780 did not help me. I didn't spot 118656, I'll try that if the error reoccurs. Thank you!