Re: multiple inbound messages

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Hey Greg, I'm doing some research into this. All research seems to
indicate more of a networking issue or filtering mechanism. In one
instance, the culprit was their firewall (SonicWall) and an upgrade of
their firm resovled the issue, some issue with MTU. But I agree, this
has to be either a networking\firewall issue. If you have support for
your firewall applicance, I would ask them if this is known issue, they
may be able to help sort through your firewall logs to see if there are
any issues.

http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_21403060.html

James Chong
MCSE | M+, S+, MCTS, Security+
msexchangetips.blogspot.com



gregski wrote:
No, it just happens between our server and their servers. Same at my end. I
only have this problem with them.
My last comment was that they have a few outgoing email servers, that are
all apparently configured the same. Email to me from their support group
goes through one of them, but it doesn't exhibit the connection problem.
This doesn't make sense. If they're all the same, the problem should appear
in all also.

"jamestechman@xxxxxxxxx" wrote:

Sorry couldn't make out your last comment. Did they say if this occurs
when they send to other domains?


James Chong

gregski wrote:
Thanks for the response James.

Here's a telnet session they did:

root@relay03# telnet 0.0.0.0 25
Trying 0.0.0.0...
Connected to 0.0.0.0.
Escape character is '^]'.
220 MAILSERVER.receiver.com Microsoft ESMTP MAIL Service, Version:
5.0.2195.6713 ready at Mon, 31 Jul 2006 13:51:55 -0400

Here I typed "quit"

221 2.0.0 MAILSERVER.receiver.com Service closing transmission channel
Connection closed by foreign host.

This looks ok to me.
One other thing. The email server that their support service contacts me
with doesn't exhibit this problem. According to them it is the same as the
other email servers that do!

Any help would be much appreciated. Thanks.


"jamestechman@xxxxxxxxx" wrote:

It appears that their SMTP transaction is prematurely terminating
causing duplicate messages. Were you able to get a bigger sample of his
logs? Did this party say that you were the only organization that was
reporting duplicates from them? I would like to rule out the
possibility that this is only occuring when sending to you. That way we
can isolate if it's something on either his or your end. Have him
sample couple times doing a telnet session to your mail server and see
if he experiences a premature termination.

James Chong
MCSE | M+, S+, MCTS, Security+
msexchangetips.blogspot.com



gregski wrote:
Hi,

I'm running Exchange 2k Std and have the following problem. The same email
message is received many times. These external problem emails all come from
one company. They have two senders and we have two recipients for this
problem. Their email provider claims that exchange is defering the message,
but accepting it at the same time. Hence the multiple copies.

This issue is only with one external company. How can I confirm the deferal
claim (and find a solution)? I have enabled SMTP logging. I also have max
logging for Connection Manager and Queueing Engine in MsExchangeTransport
diagnostics. Anything else?

I'm not experienced at digging deep into smtp problems, so any tips would
help!





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Relevant Pages

  • Re: multiple inbound messages
    ... gregski wrote: ... Connection closed by foreign host. ... The email server that their support service contacts me ... sample couple times doing a telnet session to your mail server and see ...
    (microsoft.public.exchange.admin)
  • Re: multiple inbound messages
    ... 220 MAILSERVER.receiver.com Microsoft ESMTP MAIL Service, ... Connection closed by foreign host. ... sample couple times doing a telnet session to your mail server and see ...
    (microsoft.public.exchange.admin)
  • RE: CONNECTION UNEXPECTEDLY TERMINATED
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