How many DNS server addresses do you have listed in your SMTP service...If more than 1 remove all but one...apply and bounce service...This is an old issue and you will see it in the older versions of the software
Eric S ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, March 21, 2004 11:39 AM Subject: [IMail Forum] smtp32.exe not sending, dns seems fine. > Hi chaps > > I've searched through the archives, and although I've found a lot of similar > issues, nothing seems to cover the exact issues I'm having...... so I need a > little help ;-) > > We're running Imail 7.07 (with the hotfixes and due to upgrade to latest version > soon) and have been for some time, over the past week, people have complained of > mail delivery problems (outgoing mail, mail coming into the servers is fine). > This has now resulted in both Imail servers not sending any outgoing mail. > > In the logs I get entries like: > > 20040321 000043 127.0.0.1 SMTP (2232) Trying musicradio.com (0) > 20040321 000805 127.0.0.1 SMTP (2276) MX connect fail "62.231.131.195" > > Essentially, I can see Imail generating mx connect fail entries for all mx > records of outgoing mail addresses(and then eventually a delivery failure for > the domain name itself). Even though these addresses are all correct. > > This is what I've done: > 1. Checked connectivity - mail servers are reachable. > 2. Tried sending mail via telnet from the servers - all fine. > 3. Checked outgoing DNS - can happily get mx records back from the dns server. > 4. As per various posts, ensured we are only using one dns server. > 5. Tried manually specifying domains in hosts - makes no difference. > 6. Cleared the spool directory - no difference. > 7. Checked the firewall logs. Can see conversations between our mail servers > and others. > 8. Tried disabling NICS, to avoid confusion (we have two nics) and restarted, - > no difference. > 9. smacked by head on the desk repeatedly. > 10. rebooted/stopped services after each of the above changes. > > I've now gotten to the point of physically sniffing the wire. Essentially, I > see incoming smtp connections that all complete successfully. but as far as > outbound mail sessions are concerned - I see a request for dns going to our dns > server and a correct reponse to the Imail server and then I see.... nothing. > Absolutely nothing. No outgoing ping to see if the remote mail server is there, > no smtp outbound connection, absolutely nothing. > > I've tried stopping all services and running smtp32.exe from the command line > and I see it generating the connect failures in the log, but I see no outbound > network traffic for smtp(but I see the dns lookups happily replied to). > > There is obviously something odd going on here for this to affect both machines, > but I'll be damned if I can see what. Can anyone point me to the holy grail? > > Many thanks > > Ross > > > > > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
