[ExchangeList] Re: Repeating Emails
- From: "Rich Gallo" <RGallo@xxxxxxxxxxxxxxxxx>
- To: <exchangelist@xxxxxxxxxxxxx>
- Date: Tue, 13 Feb 2007 13:10:26 -0500
Awesome info, Jason. The info I am trying to lock down right now is whether
it’s my Exchange server that is making the request to resend the messages, or
my spam filter. I am leaning toward my spam filter being the culprit as I can
see every instance of this message being sent in the logs on the spam filter
(it is a Barracuda Spam Firewall 300)…
I am going to start with your suggestions and go from there, then write back to
share the results. Thank you VERY much :-)
_____
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Sherry
Sent: Tuesday, February 13, 2007 12:35 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Repeating Emails
You said your MX records point to “your spam filter”, is this another server or
an appliance?
What does the message header look like once the user receives the message? Is
the routing path correct?
I would guess that your spam filter is messing up and re-transmitting the
messages for some odd reason.
From the screenshot below it looks like messages are re-transmitted every ~30
mins. Are all the messages repeated about every 30mins?
Any odd event logs? Might want to turn logging to Medium on
MSExchangeTransport\SMTP Protocol, Categorizer, Routing Engine/Service,
Do you have SMTP protocol logging enabled? If so check to see where the
messages are coming from each time. If they are coming from your spam filter
check the logs on it to see if it is receiving the message multiple times. If
it is receiving the messages multiple times it might be sending a transmit
error or some type to the sending server which is in turn causing the sending
server to retransmit the message. If it is only receiving it once but then
resending the messages multiple times to your Exchange server I would contact
the vendor of your spam filter. Check your SMTP protocol log on the Exchange
server to see if it is generating any error
General SMTP Troubleshooting info: HYPERLINK
"http://technet.microsoft.com/en-us/library/aa996805.aspx"http://technet.microsoft.com/en-us/library/aa996805.aspx
MSExchange.org troubleshooting article: HYPERLINK
"http://www.msexchange.org/tutorials/Exchange-Server-2003-Mailflow-Part1.html"http://www.msexchange.org/tutorials/Exchange-Server-2003-Mailflow-Part1.html
Jason Sherry
Messaging Architect, MCSE: M, Microsoft MVP
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Rich Gallo
Sent: Tuesday, February 13, 2007 10:04 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Repeating Emails
Some very good thoughts, but nothing I have found seems to point in that
direction :-( Here is an example of what I am dealing with in regards to one of
these messages. This is a screen shot from Message Tracking center for ONE of
these messages (this isn’t even the entire result…it keeps going until I
blocked the sender early this morning) See how the same message keeps getting
delivered over and over and over again???:
_____
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Taylor, George
Sent: Tuesday, February 13, 2007 11:38 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Repeating Emails
It kinda sounds like a scripting or group membership issue at the sending side.
Could the other end be sending to multiple groups with the user in each one of
those groups? Sending directly to the user and then again to a group the user
is a member of. Someone fat fingered a script on the sending machine? The
sender is Outlook with multiple rules that trigger on the same criteria? Just a
few thoughts.
George Taylor
Systems Programmer
Regional Health Inc.
_____
From: Rich Gallo [mailto:RGallo@xxxxxxxxxxxxxxxxx]
Sent: Tuesday, February 13, 2007 8:31 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Repeating Emails
I should have said this in my previous email… The only common thread with
these messages are that they are messages that are automatically generated.
For example, a hotel reservation, or a confirmation that something has been
received, such as a resume submission… Other than that, these messages are
fairly innocuous.
_____
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Sarbjit Singh Gill
Sent: Tuesday, February 13, 2007 10:10 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Repeating Emails
Is there something common in the users who receive multiple copies this emails.
For example, they have certain embedded data in the email (like a picture) or
maybe they all had a certain kind of attachment of a certain size
/Gill
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Rich Gallo
Sent: Tuesday, February 13, 2007 10:56 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Repeating Emails
Hey All,
I wanted to know if anyone has ever come across this problem. Been scouring
the net like crazy and not coming up with anything solid.
Every now and again, I have users telling me they are receiving MANY copies of
the same message form the same sender (known senders in all cases). Looking at
things from my end, server side, it’s as if Exchange is “rejecting” the email,
requesting another copy form the sending server, and still delivering each
instance of the copy to the recipient on my end. The cycle doesn’t end until I
block the sender in he spam filter to stop the message in its tracks before it
hits my Exchange server again. I don’t know what to do here..pulling my hair
out… ANY HELP at all is GREATLY appreciated!!
Rich Gallo
Network Administrator
Lloyd Staffing
PS, it’s Exchange 2003 SP2 running on Windows Server 2003 Standard, SP1….
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