open relay

  • From: "Jennifer Finstad" <jfinstad@xxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Wed, 4 Sep 2002 09:06:30 -0500


We are running same Exchange 5.5, service pack 4 and have been identified as
an open relay. We've tried several fixes, none have worked, been to several
sites, etc.

Any suggestions, I'm a newbie, thanks.

----- Original Message -----
From: "Tom Avery" <tavery@xxxxxxxxxxx>
To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
Sent: Tuesday, September 03, 2002 9:54 PM
Subject: [exchangelist] The recipient was unavailable to take delivery of
the message

> Hello everyone,
> I have encountered a very unique situation. I am running exchange server
> 5.5 with service pack 4. I am receiving the following error when my users
> send email to one specific domain (in this case AOL).
> Your message did not reach some or all of the intended recipients.
> To: 'XXX@xxxxxxx'
> Subject: test
> Sent: 9/3/02 7:02:38 PM
> The following recipient(s) could not be reached:
> 'gojeni@xxxxxxx' on 9/3/02 7:02 PM
>     The recipient was unavailable to take delivery of the message
> The MTS-ID of the original message is: c=US;a= ;p=American
> Trailer;l=EXCHANGE-CDM-020904020238Z-78
>     MSEXCH:IMS:American Trailer Corp.:CDM:EXCHANGE-CDM 3550 (000B09AA) 550
> 703.265.4670.
> What's interesting about this message, is that it is not DNS related. My
> server was an open relay, but that has been corrected and the server's IP
> has been removed from all the DNS block lists around including AOL. My
> users can send and receive email to everywhere else except AOL. Another
> interesting thing, is when I examine the e-mail header on the returned
> message, it is blank (Listing no internet addresses or servers) which
> leads me to believe the problem is within the exchange server itself.
> Has any one ever experienced this??? If so, I would love to hear how you
> corrected it.
> Thanks,
> Tom Avery
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