We noticed this appearing in one of the mailserver logs. Not often, perhaps once a week.
imap failed @ *TIMESTAMP*. A restart was attempted automagically.
Service Check Method: [socket connect]
Reason: TCP Transaction Log:
<< * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2011 Double Precision, Inc. See COPYING for distribution information.
>> A001 LOGIN __cpanel__service__auth__imap__*********
<< * BYE Temporary problem, please try again later
imap: ** [* BYE Temporary problem, please try again later != A001 OK]
: Died at /usr/local/cpanel/Cpanel/TailWatch/ChkServd.pm line 689, <$socket_scc> line 2.
Number of Restart Attempts: 1
Startup Log: Starting Courier authentication services: authdaemond
ier-IMAP server: imap imap-ssl pop3 pop3-ssl
The fix was here:
Go to Main >> Service Configuration >> Mailserver Configuration
Increasing "Number of Authentication Daemons" resolves this problem.
Until you have more users of course!