On Wednesday, December 12, 2012 07:05:51 PM Tony Nelson wrote: > I just upgraded my Ubuntu server from 10.04 to 12.04 which upgraded Postfix > to 2.9.1-4. The postfix server sits behind my firewall, in front of my > corporate Exchange servers. > > After the upgrade I found that my exchange servers would/could no longer > send mail. I got the following error: > > Dec 12 18:48:41 mail postfix/smtpd[3093]: lost connection after EHLO from > NY-HUBT02.WIN.STARPOINT.COM<http://NY-HUBT02.WIN.STARPOINT.COM>[192.168.43. > 19] > > A bit of googling pointed me to TLS issues. After trying several things, I > commented out my TLS configuration parameters, and sure enough all of the > mail flowed out of my Exchange servers, so the problem is definitely TLS > related.
Re-enable package updates (they are enabled by default). If you had them enabled, you would have postfix 2.9.3-2~12.04.4. IIRC, there were changes in postfix 2.9.2 or 3 to integrate better with openssl 1.0.1, which Ubuntu 12.04 also ships. Scott K
