all messages deleted from inbox

[Michael Crumm]

hello,

this morning one of my users called and said they logged in to find no 
messages in their inbox.  all messages in subfolders were intact.  i 
checked the mail folder on the filesystem and literally no messages 
exist in the base of the user's folder.

this user is setup for imap, using thunderbird 1.5  they also tried 
connecting over our webmail service, but of course, the result was the same.

i checked all the imapd logs and there is no indication of any files 
being removed at all.

2 questions:  1) is there somewhere else i should be looking (i.e, other 
logs) to find out what happened? and 2)the cyr_db log indicates that 
some sort of backup was done last night at midnight.  i notice a few 
__db.00x files under imapd.  can i possibly recover the user's mailbox 
with these files?  if so, where might i find information on that process?

thanks in advance,
michael crumm
michaelc at bway.org