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Home > Archive > IIS and SMTP > October 2004 > Troubleshooting IIS6 SMTP and Incoming Email
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| Author |
Troubleshooting IIS6 SMTP and Incoming Email
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| T. Garay 2004-10-26, 5:50 pm |
| Lately we've seen issues where emails are delayed as much as 6 hours
or never arrive.
I get a complaint and start going through the logs.
The MS SMTP server appears to only record one side of the
conversation. I see the email in question trying to come in but it
doesn't make it and I can't find any errors (event log or SMTP log) to
indicate why.
Basically, I see something similar to the following:
smtp1.sender.com 10/21/2004 7:43:38 PM 250 HELO
smtp1.sender.com
smtp1.sender.com 10/21/2004 7:43:38 PM 250 MAIL
FROM:<somebody@sender.com>
smtp1.sender.com 10/21/2004 7:43:39 PM 250 RCPT
TO:<me@mydomain.com>
smtp1.sender.com 10/21/2004 7:43:49 PM 240 QUIT
smtp1.sender.com
Sometimes, after several attempts, then it will show up like:
smtp1.sender.com 10/22/2004 5:28:44 PM 250 HELO
smtp1.sender.com
smtp1.sender.com 10/22/2004 5:28:44 PM 250 MAIL
FROM:<somebody@sender.com>
smtp1.sender.com 10/22/2004 5:28:45 PM 250 RCPT
TO:<me@mydomain.com>
smtp1.sender.com 10/22/2004 5:28:57 PM 250 DATA
<2004102217160100000000@WinSockMail>
smtp1.sender.com 10/22/2004 5:28:58 PM 240 QUIT
smtp1.sender.com
I have no idea why it's not sending the data. The email does not make
it to the Exchange server & the user's mailbox unless the DATA entry
is in there.
Anyone have any ideas or perhaps tools that I can use to record the
whole conversation for each email connection that comes in??
Thanks!
-Tim
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| Ken Schaefer 2004-10-27, 2:49 am |
| Well, for some reason it seems that the remote server is never sending the
DATA command (which is what is used to actually pass the email message to
your server).
You could use ethereal (www.ethereal.com) to capture all traffic coming in
(just make sure you put a filter on it, so you're only capturing data on
port 25!)
Cheers
Ken
"T. Garay" <moc.etluhcS-noirehpS@yhtomiT> wrote in message
news:vrftn0l5m7v58ij8rbo353rqqcc9oi89go@
4ax.com...
> Lately we've seen issues where emails are delayed as much as 6 hours
> or never arrive.
>
> I get a complaint and start going through the logs.
>
> The MS SMTP server appears to only record one side of the
> conversation. I see the email in question trying to come in but it
> doesn't make it and I can't find any errors (event log or SMTP log) to
> indicate why.
>
> Basically, I see something similar to the following:
>
> smtp1.sender.com 10/21/2004 7:43:38 PM 250 HELO
> smtp1.sender.com
> smtp1.sender.com 10/21/2004 7:43:38 PM 250 MAIL
> FROM:<somebody@sender.com>
> smtp1.sender.com 10/21/2004 7:43:39 PM 250 RCPT
> TO:<me@mydomain.com>
> smtp1.sender.com 10/21/2004 7:43:49 PM 240 QUIT
> smtp1.sender.com
>
> Sometimes, after several attempts, then it will show up like:
>
> smtp1.sender.com 10/22/2004 5:28:44 PM 250 HELO
> smtp1.sender.com
> smtp1.sender.com 10/22/2004 5:28:44 PM 250 MAIL
> FROM:<somebody@sender.com>
> smtp1.sender.com 10/22/2004 5:28:45 PM 250 RCPT
> TO:<me@mydomain.com>
> smtp1.sender.com 10/22/2004 5:28:57 PM 250 DATA
> <2004102217160100000000@WinSockMail>
> smtp1.sender.com 10/22/2004 5:28:58 PM 240 QUIT
> smtp1.sender.com
>
> I have no idea why it's not sending the data. The email does not make
> it to the Exchange server & the user's mailbox unless the DATA entry
> is in there.
>
> Anyone have any ideas or perhaps tools that I can use to record the
> whole conversation for each email connection that comes in??
>
> Thanks!
>
> -Tim
>
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