iis smtp nntp: SMTP Service Sending Mail - Can deliver by telnet but service cannot -- iis smtp nntp

Re: SMTP Service Sending Mail - Can deliver by telnet but service cannot

PeterD
10/19/2005 5:40:31 PM

What do the logs show?

On Wed, 19 Oct 2005 20:57:53 +0100, "David Morgan"
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SMTP Service Sending Mail - Can deliver by telnet but service cannot

David Morgan
10/19/2005 8:57:53 PM

Hello

From our mail server I can successfully send an email to yahoo.co.uk using
telnet.

The SMTP Service however cannot. We have hundreds of emails queuing.

Any ideas?

Thanks

David

Re: SMTP Service Sending Mail - Can deliver by telnet but service cannot

David Morgan
10/19/2005 11:27:11 PM

Hi

I have restarted the SMTP Service numerous times. Once or twice it worked
and the queues cleared. This problem has only started happening in the last
72 hours and I am in communication with Yahoo about it although all they
seem to want to talk about is delivery into bulk mail folders.

I should point out that we are ok with mail to yahoo.com and aol.com etc.
We have SPF and rDNS.

I have also run ipconfig /flushdns in case of outdated DNS info but to no
avail.

Thanks for your thoughts.

David

[quoted text, click to view]

Re: SMTP Service Sending Mail - Can deliver by telnet but service cannot

David Morgan
10/19/2005 11:35:22 PM

What do the logs ever show?

I have yet to see a meaningful/helpful message logged in the event logs for
the SMTP Service ever and we're talking a number of years now.

I have 2000 messages queuing for yahoo.co.uk and only one event logged in
System:

Message delivery to the remote domain 'yahoo.co.uk' failed for the following
reason: The connection was dropped by the remote host.

I can only assume that we are getting connected but something else is
preventing the message from being delivered or finished. The error above
probably pertains to an invalid user at Yahoo.

I have enabled logging via the IIS configuration. I will report back here
with output.

Thanks for your input.

David

[quoted text, click to view]

Results from LogFile

David Morgan
10/19/2005 11:39:13 PM

Having just restarted it again it is now sending to yahoo.co.uk.

I will post logfile results here if it hangs up again.

"David Morgan" <microsoft_newsgroups.nospam@davidmorgan.me.uk> wrote in
message news:uGnbygO1FHA.3256@TK2MSFTNGP09.phx.gbl...
[quoted text, click to view]

Re: SMTP Service Sending Mail - Can deliver by telnet but service cannot

PeterD
10/20/2005 9:13:05 AM

On Wed, 19 Oct 2005 23:35:22 +0100, "David Morgan"
[quoted text, click to view]

Ah, but that's what I wanted to hear! This indicates (to me, at least)
that for some reason yahoo.co.uk has blacklisted your domain, or are
doing a reverse DNS and the returned domain doesn't match the sending
domain.

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Re: SMTP Service Sending Mail - Can deliver by telnet but service cannot

David Morgan
10/21/2005 12:20:00 AM

Unfortunately, we are "whitelisted" and have rDNS set-up. See my later post
in this same NG.

Thanks for your help.

[quoted text, click to view]

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