Mailing List CGatePro@mail.stalker.com Message #105198
From: James Roman <james.roman@ssaihq.com>
Subject: Re: Yahoo, unreachable for too long ?
Date: Tue, 7 Oct 2014 08:40:44 -0400
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>
X-Mailer: Apple Mail (2.1878.6)
On Oct 7, 2014, at 7:00 AM, CommuniGate Pro Discussions <CGatePro@mail.stalker.com> wrote:

From: "Taylor, Jonn" <jonnt@taylortelephone.com>
Subject: Re: Yahoo, unreachable for too long ?
Date: October 6, 2014 at 9:43:38 AM EDT


Search yor logs for this.

19:54:40.348 3 SMTPI-020151(nm23-vm4.bullet.mail.gq1.yahoo.com) failed
to receive message body (11850 bytes). Error Code=message line is too long
20:22:37.813 3 SMTPI-020199(nm14-vm8.bullet.mail.gq1.yahoo.com) failed
to receive message body (3741 bytes). Error Code=message line is too long
21:00:33.034 3 SMTPI-020251(nm3-vm6.bullet.mail.gq1.yahoo.com) failed to
receive message body (12964 bytes). Error Code=message line is too long
21:04:07.560 3 SMTPI-020260(nm29-vm1.bullet.mail.gq1.yahoo.com) failed
to receive message body (14835 bytes). Error Code=message line is too long
21:05:23.167 3 SMTPI-020262(nm3-vm7.bullet.mail.gq1.yahoo.com) failed to
receive message body (3742 bytes). Error Code=message line is too long
21:08:18.474 3 SMTPI-020268(nm9-vm2.bullet.mail.gq1.yahoo.com) failed to
receive message body (4159 bytes). Error Code=message line is too long

What OS are you using? I am on CentOS 5.11 x86_64

Taylor Telephone Systems, Inc <http://www.taylortelephone.com/>

This doesn’t look like your connection with Yahoo is actually using TLS (or at least your mail server doesn’t think it is). Are you using a firewall that is configured to inspect your mail traffic (Cisco ASA, etc.)?  If you telnet to port  25 on your mail gateway from an external host what response do you get? It should look something like:

prompt$ telnet mx.maildomain.com 25
Trying 111.111.1.11…
Connected to mx.maildomain.com.
Escape character is '^]'.
220 maildomain.com ESMTP is glad to see you! 
250-DSN
250-SIZE 31457280
250-STARTTLS
250-AUTH LOGIN PLAIN
250-ETRN
250-TURN
250-ATRN
250-NO-SOLICITING
250-HELP
250-PIPELINING
250 EHLO
QUIT
221 maildomain.com maildomain.com Mail Server SMTP closing connection 
Connection closed by foreign host.

Replace the server name and host name with the appropriate values.

If you don’t see the STARTTLS command returned or it is returned with something like “2-XXXXXXXXX” then your firewall is screwing with your mail stream and preventing TLS communication so that it can inspect the contents of the message. This inspection is on by default on most Cisco firewalls. This is normally appropriate for SMTP connections to or from clients behind a firewall, where they are trying to bypass your mail gateway, but not for the mail gateway itself. You would need to configure a separate (non-default) inspection rule for your mail server.

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