On Dec 12, 2012, at 7:20 PM, Scott Kitterman wrote:

> 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


Scott, you hit the nail on the head.

It appears that my upgrade didn't go so well.  After running apt-get 
update/upgrade I ended up upgrading some 250+ packages, including Postfix.  I 
now have 2.9.3-2~12.04.4 as you suggested and TLS has started working again.

Thank everyone very much for their time.

Tony Nelson
Starpoint Solutions


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