Thunderbird problem

Every once in a while my thunderbird client will stop sending copies of sent mail and throw me an error about server Bug.  This is maddening and is intermittent and effects only certain email accounts.  The only way to fix it is to delete the email account from cwp panel and create a new one.  But if I do that, I lose all of my saved emails.  This sux.

Code: [Select]

Feb 12 18:21:14 server postfix/anvil[10973]: statistics: max cache size 1 at Feb 12 18:17:53
Feb 12 18:22:54 server postfix/smtpd[11717]: connect from unknown[45.66.230.156]
Feb 12 18:22:55 server postfix/smtpd[11717]: Anonymous TLS connection established from unknown[45.66.230.156]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Feb 12 18:22:57 server postfix/smtpd[11717]: warning: unknown[45.66.230.156]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Feb 12 18:22:57 server postfix/smtpd[11717]: disconnect from unknown[45.66.230.156] ehlo=2 starttls=1 auth=0/1 quit=1 commands=4/5
Feb 12 18:23:06 server postfix/smtpd[11752]: warning: hostname 65-131-244-13.orlf.centurylink.net does not resolve to address 65.131.244.13: Name or service not known
Feb 12 18:23:06 server postfix/smtpd[11752]: connect from unknown[65.131.244.13]
Feb 12 18:23:06 server postfix/smtpd[11752]: Anonymous TLS connection established from unknown[65.131.244.13] to mail.lakeservers.com: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Feb 12 18:23:06 server postfix/smtpd[11752]: lost connection after CONNECT from unknown[65.131.244.13]
Feb 12 18:23:06 server postfix/smtpd[11752]: disconnect from unknown[65.131.244.13] commands=0/0
Feb 12 18:23:06 server postfix/smtpd[11752]: warning: hostname 65-131-244-13.orlf.centurylink.net does not resolve to address 65.131.244.13: Name or service not known
Feb 12 18:23:06 server postfix/smtpd[11752]: connect from unknown[65.131.244.13]
Feb 12 18:23:06 server postfix/smtpd[11752]: SSL_accept error from unknown[65.131.244.13]: lost connection
Feb 12 18:23:06 server postfix/smtpd[11752]: lost connection after CONNECT from unknown[65.131.244.13]
Feb 12 18:23:06 server postfix/smtpd[11752]: disconnect from unknown[65.131.244.13] commands=0/0
Feb 12 18:23:06 server postfix/smtpd[11752]: warning: hostname 65-131-244-13.orlf.centurylink.net does not resolve to address 65.131.244.13: Name or service not known
Feb 12 18:23:06 server postfix/smtpd[11752]: connect from unknown[65.131.244.13]
Feb 12 18:24:21 server postfix/smtpd[11752]: SSL_accept error from unknown[65.131.244.13]: Connection reset by peer
Feb 12 18:24:21 server postfix/smtpd[11752]: lost connection after CONNECT from unknown[65.131.244.13]
Feb 12 18:24:21 server postfix/smtpd[11752]: disconnect from unknown[65.131.244.13] commands=0/0
Feb 12 18:24:21 server postfix/smtpd[11752]: warning: hostname 65-131-244-13.orlf.centurylink.net does not resolve to address 65.131.244.13: Name or service not known
Feb 12 18:24:21 server postfix/smtpd[11752]: connect from unknown[65.131.244.13]
Feb 12 18:25:36 server postfix/smtpd[11752]: SSL_accept error from unknown[65.131.244.13]: Connection reset by peer
Feb 12 18:25:36 server postfix/smtpd[11752]: lost connection after CONNECT from unknown[65.131.244.13]
Feb 12 18:25:36 server postfix/smtpd[11752]: disconnect from unknown[65.131.244.13] commands=0/0
Feb 12 18:27:23 server postfix/smtpd[12344]: warning: hostname 65-131-244-13.orlf.centurylink.net does not resolve to address 65.131.244.13: Name or service not known
Feb 12 18:27:23 server postfix/smtpd[12344]: connect from unknown[65.131.244.13]
Feb 12 18:27:23 server postfix/smtpd[12344]: Anonymous TLS connection established from unknown[65.131.244.13] to mail.lakecountyprocessservers.com: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
Feb 12 18:27:23 server cbpolicyd[19381]: module=Quotas, mode=update, host=65.131.244.13, helo=[192.168.0.16], from=2017@lakecountyprocessservers.com, to=2022@lakeservers.com, reason=quota_update, policy=7, quota=4, limit=5, track=Sender:@lakecountyprocessservers.com, counter=MessageCount, quota=5.99/200 (3.0%)
Feb 12 18:27:23 server postfix/smtpd[12344]: E60C81431A4: client=unknown[65.131.244.13], sasl_method=PLAIN, sasl_username=2017@lakecountyprocessservers.com
Feb 12 18:27:24 server postfix/cleanup[12350]: E60C81431A4: message-id=
Feb 12 18:27:24 server postfix/qmgr[8168]: E60C81431A4: from=, size=837, nrcpt=1 (queue active)
Feb 12 18:27:24 server postfix/lmtp[12351]: E60C81431A4: to=, relay=server.foreveryours.us[private/dovecot-lmtp], delay=0.3, delays=0.26/0.01/0.01/0.02, dsn=2.0.0, status=sent (250 2.0.0 eGaYBtx16WNAMAAA8sBYbA Saved)
Feb 12 18:27:24 server postfix/qmgr[8168]: E60C81431A4: removed
Feb 12 18:27:24 server postfix/smtpd[12344]: disconnect from unknown[65.131.244.13] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8

Funny thing is that I've seen countless T-Bird IMAP bugs over the years. And yet, Postbox (a commercial Thunderbird derivative, still using the T-Bird mail engine) seems to have fixed those IMAP errors! I never encounter any when I use Postbox, and having bought a lifetime license years ago, I get all updates that have been released. It offers a lot more spit-n-polish than the default T-bird experience.

Have you checked if you are asked to accept the SSL certificate?
What server do you have set in the smtp and pop?
I configure the accounts with the name of the main domain where CWP is installed.
If I use their domains with my clients, both Outlook and Thunderbird give me problems.