Thank you for you link. I read a lot of posts for this, but I couldn't solve this.
Now, although Thunderbird error message is the same, when I checked mailbox.log, I found that there are no error messages, but this:
2009-03-26 18:44:51,023 INFO [ImapServer-13] [] imap - [X.X.X.MAIL] connected
2009-03-26 18:44:51,024 INFO [ImapServer-13] [ip=X.X.X.MAIL;oip=X.X.X.FIREWALL;] imap - IMAP client identified as: {X-ORIGINATING-IP=X.X.X.FIREWALL}
2009-03-26 18:44:51,024 INFO [ImapServer-13] [name=NAME@SERVER;ip=X.X.X.MAIL;oip=X.X.X.FIREWALL;] imap - user NAME@SERVER authenticated, mechanism=PLAIN
2009-03-26 18:44:51,028 INFO [ImapServer-13] [name=NAME@SERVER;ip=X.X.X.MAIL;oip=X.X.X.FIREWALL;] imap - selected folder Drafts
What is interesting for me is this "mechanism=PLAIN", although SMTP secure connection is set to TLS.
I must make some correction: IMAP and POP3 work with TLS or SSL only (which is logical), but SMTP works without security or with SSL only (TLS doesn't work, which doesn't make sense for me).
How is this possible? MTA settings for "Enable Authentication" and "TLS authentication only" are on.  |