Mohamed Navas wrote:

We have been using the mail server with postfix and dovecot IMAP. This is the second time we are facing the problem of inbox of some users are completely empty.

Pls advice anyway to recover

Let the user use the client s/he was using just moment the messages disappeared.

and to rectify the problem for such threat in

future.

Disable POP3. ;-)

Anyway, to identify such problems I recommend using the mail_log plugin. It uses resources (slows down server, consumes logging space), but you can see _when_ the INBOX got empty and I will bet that most of the time the last access was via POP3. It might happen that an user unintentionally delete the INBOX, which is automatically recreated later.

Bye,

-- Steffen