Originally Posted by till
ensure that all folders are owned by user and group vmail and that you use the same imap server (couroer / dovecot( that you used on your otherserver. the ispconfig version does not matter as the folder layout or users have not been changed.
I made chown -R vmail:vmail /var/vmail and now I have in mail.log this:
Mar 25 17:35:15 mail imapd: LOGIN FAILED, email@example.com, ip=[::ffff:127.0.0.1]
The login and password are still the same. I can login to mailbox with this credentials on old ispconfig from which I export the db. But on this new one I cannot.