Are you using a mail services (postini) to check your outbound mail, if so
is your account ok with them, have you tested from outside using a site like
http://mxtoolbox.com
HTH,
Bob Smith
--------------------------------------------------
From: <jesse-r...@wi.rr.com>
Sent: Monday, October 04, 2010 10:50 AM
To: "NT System Admin Issues" <ntsysadmin@lyris.sunbelt-software.com>
Cc: "Maglinger, Paul" <pmaglin...@scvl.com>
Subject: outbound smtp broke (connection to host lost)
Stuck on this one.
(1) Exch 2003 server that is my SMTP outbound connector
(1) Exch 2007 server that only hosts mailboxes
For some reason my Exch 2003 server stopped sending outbound emails on
Friday. All messages are getting stuck in the queue and show "the
connection was dropped by the remote host" when I look at the queue. I
made sure that our outgoing IP (24.56.73.162) is NOT on spamhaus or other
blacklist. So everything looks good there.
If I try telneting from the Exch 2003 server, it opens successfully to a
destination mail server, but as soon as I try typing "H" (for Helo), it
disconnects with a "connection to host lost" message in the command
prompt.
I also, just for test purposes, tried telneting from the Exch 2007 server
(even though it does NOT deliver outbound mail at this time, it only
forwards stuff to the Exch 2003 smtp connector), to various mail servers
and the SAME thing happens from the 2007 server. I can telnet, but after
typing "H", the connection to host is lost.
What's more interesting is, on my local machine, I CAN telnet into any
internet mail server and typing "H" does NOT drop the connection at all.
I'm doubting it's a firewall issue because telnet isnt blocking the telnet
session from Exch 2003. I'm doubting we're on spamhaus, etc. (checked the
spamhaus.org website to be sure), and my ISP says it's not them dropping
the connection.. So....
Any ideas?
Thanks.
~ Finally, powerful endpoint security that ISN'T a resource hog! ~
~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
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