I'm grasping too right now, lol. We have static IPs btw. And all the tests I've done for blacklists show we're OK - including the link you passed along.
(grumble) J Original Message: ----------------- From: John Aldrich [email protected] Date: Mon, 4 Oct 2010 11:38:55 -0400 To: [email protected] Subject: RE: outbound smtp broke (connection to host lost) Note, I'm just grasping at straws here... you could also check http://www.dnsbl.info/dnsbl-database-check.php to see if you are listed in *any* database. I'm sure that's not a complete list, but it's on that checks a large number of lists from one site. -----Original Message----- From: John Aldrich [mailto:[email protected]] Sent: Monday, October 04, 2010 11:33 AM To: NT System Admin Issues Subject: RE: outbound smtp broke (connection to host lost) Is your Ex 2003 server set up as your mail host in DNS? Also, are you on a static IP or a dynamic IP? If the latter, that could be the problem. Some places won't accept SMTP connections from a dynamic IP, although if that's the case why you can telnet on port 25 from your desktop, but not on the servers, I don't know. -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Monday, October 04, 2010 10:50 AM To: NT System Admin Issues Cc: Maglinger, Paul 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/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin -------------------------------------------------------------------- mail2web - Check your email from the web at http://link.mail2web.com/mail2web ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
