[ExchangeList] Re: Relaying mail but NOT an open relay... Compromised?

  • From: "Greg Herzog" <glherzog@xxxxxxxxxxx>
  • To: <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 17 Jul 2006 10:43:56 -0400

http://www.msexchange.org
-------------------------------------------------------i have. check the logs to make sure that you don't have a compromised user account. something stupid like an easy password on a service account that has a mailbox, and they can send mail to whomever they want all day long.


----- Original Message ----- From: "Tasita Ebacher" <tebacher@xxxxxxxxxxxxxxxxxxxxx>
To: <exchangelist@xxxxxxxxxxxxx>
Sent: Monday, July 17, 2006 10:30 AM
Subject: [ExchangeList] Relaying mail but NOT an open relay... Compromised?



http://www.msexchange.org -------------------------------------------------------Hello all,


I'm working on an Exchange Server 2003 server that appears to be sending mail like it's an open relay. In the Message Tracking Center there are lots of messages (a few every minute) that are from external domains being sent to other external domains.

The server is setup to NOT be relaying anything, and Relay tests have
proved negative for being a relay.

The client has even called Microsoft to get support on the server and
they couldn't find any problem.  I just don't see how it's relaying
mail...  Unless it's internally compromised somehow, but I can't see
anything unusual.


Has anyone ever seen anything like this before...??

I appreciate any advice!

Thank you,
TE
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