Hi All, I am upgrading/migrating an email server from: Ubuntu 10.10, Postfix, Popa3d, Spamassassin and Mailscanner using Pop on 110 to Ubuntu14.04 Postfix, Dovecot, Spamassassin and Amavis using Pop on 995 also This is fresh install of Ubuntu1404 on new hardware. All user files and accounts detail have been transferred. My problem is that I am having difficulties transferring users with Outlook 2007 clients. Outlook 2007 will not login to the new server for POP user that were on the old server But new users wil same Pop (and smtp setting) will login no problem and have full email functionality Login (userame and password) using old server account details work on new server as expected after transferring. Using Outlook 2003 everything works well. Using telnet, openssl command line for pop, smtp and imap work fine (with TLS, SSL and unencrypted) Anyone ideas why outlook 2007 wont work?? and if so how can I fix it? (OK I know.. no one should use Outlook!! But too many ppl still do!) Daniel.