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| | | Forum Member
 
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Last Login: 10/3/2009 10:18:22 PM
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| For a period of about six weeks, we've had some trouble getting mail delivered to certain hosts. Among them is Network Solutions. It's a small percentage overall, but a significant issue nonetheless. It seems as though the connection gets dropped right at the end.
Here's a sample of what the logs look like when the problem occurs:
04:07 10:24 SMTP-(7e1b022e00006630) Connect domain omitted [ip omitted] (1)
04:07 10:24 SMTP-(7e1b022e00006630) >EHLO mail.centric.net
04:07 10:24 SMTP-(7e1b022e00006630) 250-ns-mr24.netsolmail.com Hello mail.centric.net [69.51.66.5], pleased to meet you
04:07 10:24 SMTP-(7e1b022e00006630) 250-ENHANCEDSTATUSCODES
04:07 10:24 SMTP-(7e1b022e00006630) 250-PIPELINING
04:07 10:24 SMTP-(7e1b022e00006630) 250-8BITMIME
04:07 10:24 SMTP-(7e1b022e00006630) 250-SIZE 60000000
04:07 10:24 SMTP-(7e1b022e00006630) 250-DSN
04:07 10:24 SMTP-(7e1b022e00006630) 250-DELIVERBY
04:07 10:24 SMTP-(7e1b022e00006630) 250 HELP
04:07 10:24 SMTP-(7e1b022e00006630) >MAIL FROM: SIZE=6893
04:07 10:24 SMTP-(7e1b022e00006630) 250 2.1.0 ... Sender ok
04:07 10:24 SMTP-(7e1b022e00006630) >RCPT To:
04:07 10:24 SMTP-(7e1b022e00006630) 250 2.1.5 ... Recipient ok
04:07 10:24 SMTP-(7e1b022e00006630) >DATA
04:07 10:24 SMTP-(7e1b022e00006630) 354 Enter mail, end with "." on a line by itself
04:07 10:24 SMTP-(7e1b022e00006630) >.
04:07 10:25 SMTP-(7e1b022e00006630) rl-recv: connection reset
04:07 10:25 SMTP-(7e1b022e00006630)
04:07 10:25 SMTP-(7e1b022e00006630) Body of message generated response from the SMTP server on domain omitted: connection dropped
04:07 10:25 SMTP-(7e1b022e00006630) SMTP_DELIV_FAILED
04:07 10:25 SMTP-(7e1b022e00006630) >QUIT
04:07 10:25 SMTP-(7e1b022e00006630) [E] didn't send "QUIT
": connection reset04:07 10:25 SMTP-(7e1b022e00006630) rl-recv: connection reset
One of the support technicians at Ipswitch suspected a possible NIC issue and recommended a NIC replacement. We did so.
Another support technician suggested installing WireShark and analyzing packets being sent. That's over my head (trying to find if we are sending the requested period on a line by itself) and I'm afraid of the overhead.
Besides, why would it be just those final packets failing to just certain hosts? To those hosts it fails 100% of the time.
I've tried asking other hosts what they are seeing from their end but am not finding any of the other hosts, so far, that want to engage in troubleshooting.
Any ideas?
Thanks,
Katie |
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| | | Forum Member
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Last Login: 10/3/2009 10:18:22 PM
Posts: 36, Visits: 1,576 |
| Another example:
04:22 10:51 SMTPD(4afd03ce0000f752) [65.121.126.182] MAIL FROM:
04:22 10:51 SMTPD(4afd03ce0000f752) [65.121.126.182] RCPT TO:
04:22 10:51 SMTPD(4afd03ce0000f752) [x] looking up glt-inc.com in HOSTS
04:22 10:51 SMTPD(4afd03ce0000f752) [65.121.126.182] MAIL FROM:
04:22 10:51 SMTPD(4afd03ce0000f752) [65.121.126.182] RCPT TO:
04:22 10:51 SMTPD(4afd03ce0000f752) [x] looking up glt-inc.com in HOSTS
04:22 10:51 SMTPD(4afd03ce0000f752) [65.121.126.182] c:\IMAIL\spool\D4afd03ce0000f752.SMD 15835
04:22 10:51 SMTP-(4afd03ce0000f752) processing c:\IMAIL\spool\q4afd03ce0000f752.smd
04:22 10:51 SMTP-(4afd03ce0000f752) Authed User address ommitted@
04:22 10:51 SMTP-(4afd03ce0000f752) sender
04:22 10:51 SMTP-(4afd03ce0000f752) recip is
04:22 10:51 SMTP-(4afd03ce0000f752) [x] looking up address ommitted in HOSTS and MX
04:22 10:51 SMTP-(4afd03ce0000f752) [x] looking up address ommitted in HOSTS and MX
04:22 10:51 SMTP-(4afd03ce0000f752) closed c:\IMAIL\spool\_4afd03ce0000f752.~md - 1
04:22 10:51 SMTP-(4afd03ce0000f752) R<> - 1
04:22 10:51 SMTP-(4afd03ce0000f752) [x] doing direct send address ommitted
04:22 10:51 SMTP-(4afd03ce0000f752) Trying address ommitted (0)
04:22 10:51 SMTP-(4afd03ce0000f752) [x] Connecting socket to service on host using protocol
04:22 10:51 SMTP-(4afd03ce0000f752) [x] using source IP for mail.centric.net [192.168.69.100]
04:22 10:51 SMTP-(4afd03ce0000f752) 220 ns-mr4.netsolmail.com ESMTP
04:22 10:51 SMTP-(4afd03ce0000f752) Connect glt-inc.com [205.178.149.7:25] (1)
04:22 10:51 SMTP-(4afd03ce0000f752) >EHLO mail.centric.net
04:22 10:51 SMTP-(4afd03ce0000f752) 250-ns-mr4.netsolmail.com Hello mail.centric.net [69.51.66.5], pleased to meet you
04:22 10:51 SMTP-(4afd03ce0000f752) 250-ENHANCEDSTATUSCODES
04:22 10:51 SMTP-(4afd03ce0000f752) 250-PIPELINING
04:22 10:51 SMTP-(4afd03ce0000f752) 250-8BITMIME
04:22 10:51 SMTP-(4afd03ce0000f752) 250-SIZE 60000000
04:22 10:51 SMTP-(4afd03ce0000f752) 250-DSN
04:22 10:51 SMTP-(4afd03ce0000f752) 250-DELIVERBY
04:22 10:51 SMTP-(4afd03ce0000f752) 250 HELP
04:22 10:51 SMTP-(4afd03ce0000f752) >MAIL FROM: SIZE=16209
04:22 10:51 SMTP-(4afd03ce0000f752) 250 2.1.0 ... Sender ok
04:22 10:51 SMTP-(4afd03ce0000f752) >RCPT To:
04:22 10:51 SMTP-(4afd03ce0000f752) 250 2.1.5 ... Recipient ok
04:22 10:51 SMTP-(4afd03ce0000f752) >DATA
04:22 10:51 SMTP-(4afd03ce0000f752) 354 Enter mail, end with "." on a line by itself
04:22 10:53 SMTP-(4afd03ce0000f752) [E] didn't send "
": connection reset04:22 10:53 SMTP-(4afd03ce0000f752) [X] send error 4294967295 != 2
04:22 10:53 SMTP-(4afd03ce0000f752) >.
04:22 10:53 SMTP-(4afd03ce0000f752) [E] didn't send ".
": connection reset04:22 10:53 SMTP-(4afd03ce0000f752) rl-recv: connection reset
04:22 10:53 SMTP-(4afd03ce0000f752)
04:22 10:53 SMTP-(4afd03ce0000f752) Body of message generated response from the SMTP server on glt-inc.com: connection dropped
04:22 10:53 SMTP-(4afd03ce0000f752) SMTP_DELIV_FAILED
04:22 10:53 SMTP-(4afd03ce0000f752) >QUIT
04:22 10:53 SMTP-(4afd03ce0000f752) [E] didn't send "QUIT
": connection reset04:22 10:53 SMTP-(4afd03ce0000f752) rl-recv: connection reset
04:22 10:53 SMTP-(4afd03ce0000f752)
Still struggling.
Any observations, ideas, thoughts, suggestions?
Thanks,
Katie
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| Still battling this...
any ideas?
~Katie
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Last Login: Today @ 7:11:40 AM
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| I'm sure this is not helping you but I have just seen the first case of this on our V11 server.
In our case:
- It only happens with a certain domain
- It only happens if the mail has an attachment
Is this similar to your experience?
Regards
Stefan |
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| Stefan Paege (5/7/2009)
I'm sure this is not helping you but I have just seen the first case of this on our V11 server.
In our case:
- It only happens with a certain domain
- It only happens if the mail has an attachment
Is this similar to your experience?
Regards
Stefan
Unfortunately, in our case it happens with a number of domains and regardless of message size or the presence of an attachment.
~Katie
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| From packet captures, Imail is trying to resend the same packet but then the other server says it timed out ... looks like a routing issue.
Mike R.
Ipswitch Technical Support
http://support.ipswitch.com
Visit and see our new knowledgebase! |
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| | Just an update: Imail staff has certainly spent considerable time on this issue but we we still experience it. We now know that the problem only occurs when the pop client is MS Outlook AND the message is composed using the Word editor (plain text messages go through fine). Still trying to determine where in the combination of MS Outlook using Word + our Imail server (now version 11 but it happened with 10, too) + our network + certain receiving servers the hang up occurs and what might have happened 2.5 months ago (we made not changes) to make this start happening... ~Katie |
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| | We replaced the NIC... ~Katie |
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Time Traveler
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| | Stefan - is your case with SENDING of emails from Imail or RECEIVING of emails to IMail. I have now determined that very basic messages (generated via CDO by a web form) will crash Imail's receipt right after Imail acknowledges the DATA command to the sending server. I have confirmed that the message can be delivered to other servers just fine (by rerouting it in the sender's queue). Imail log: Exception in _OnRecvCommand: An existing connection was forcibly closed by the remote host StackTrace: at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult) at IMailServer.Session.BaseSession._OnRecvCommand(IAsyncResult ar) Sample file attached. Changing the body of the message will make the message go through. But changing the from/to or the sending server will not have any effect (I also tried inserting CR/LF to break up the long line - without any effect). I just now opened a case with support.
Best Regards,
Andy Schmidt
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