[Dshield] Somewhat OT -- bouncing e-mails -- help needed

Timothy A. Holmes tholmes at mcaschool.net
Mon Jan 29 13:27:06 GMT 2007


I have checked the logs, and there are no indications at all of any
error  


Tim Holmes
IT Manager / Webmaster / Teacher

Medina Christian Academy
A Higher Standard... 
-----Original Message-----
From: list-bounces at lists.dshield.org
[mailto:list-bounces at lists.dshield.org] On Behalf Of Glenn
Sent: Saturday, January 27, 2007 9:06 PM
To: General DShield Discussion List
Subject: Re: [Dshield] Somewhat OT -- bouncing e-mails -- help needed

Exchange/Outlook often reports an incorrect delivery error - most often
I see a invalid address being reported as a "delivery refused.  Check
the Exchange logs for the actual error message.

On 1/27/07, Timothy A. Holmes <tholmes at mcaschool.net> wrote:
>
> Hi folks:
>
> I am totally at my wits end here on this:
>
> Our administrator and some of our teachers use outlook e-mail 
> distribution lists a lot, and we have been having a LOT of trouble 
> with bouncing e-mails.  The bounce pattern is totally random -- I used

> a list of names that he sent me and sent out 2 messages about half an 
> hour apart - I got DIFFERENT bounces than he got.
>
>
> Our server is a windows 2003 server exchange (part of active 
> directory) which we host ourselves, and is physically located on our 
> premises.  As far as I know its clean (who can be sure with windows) 
> the bounce messages are predominantly 550 relaying denied messages, 
> ive included 2 below (addresses removed to protect the innocent)
>
> We (and our ISP) have checked the block lists setc, and we are finding

> nothing there.  Im fresh out of ideas and could really use some help /

> guidance etc
>
>
>
> ------------------------------------------(bounce message
> 1)---------------------------------------
> Your message did not reach some or all of the intended recipients.
>
>       Subject:  FW: Irishman
>       Sent:     1/12/2007 9:26 AM
>
> The following recipient(s) could not be reached:
>
>       XXXXXXXX at YYYYYYYYYYY.com on 1/12/2007 9:26 AM
>             You do not have permission to send to this recipient.  For

> assistance, contact your system administrator.
>             <srvexch-01.mcaschool.local #5.7.1 smtp;501 5.7.1 This 
> system is not configured to relay mail (r) from 
> <RRRRR.RRRRRRRR at mcaschool.net> to <XXXXXXXXXXXXX.YYYYYYYYYYYYYYY.com>
> for 24.239.210.32>
>
>
> -----------------------------------------(bounce message
> 2)----------------------------------------
>
> Your message did not reach some or all of the intended recipients.
>
>       Subject:  This is a second test message
>       Sent:     1/27/2007 2:12 PM
>
> The following recipient(s) could not be reached:
>
>       KKKKKKKKKKKKKK at FFFFFFFFFFFFFFFFF.com on 1/27/2007 2:12 PM
>             There was a SMTP communication problem with the 
> recipient's email server.  Please contact your system administrator.
>             <srvexch-01.mcaschool.local #5.5.0 smtp;571 
> KKKKKKKKKKKKK at FFFFFFFFFFFFFF.com prohibited. We do not relay>
>
>
> ----------------------------------------------------------------------
> --
> ---------------------------
>
> Tim Holmes
> IT Manager / Webmaster / Teacher
>
> Medina Christian Academy
> A Higher Standard...
>
>
> _________________________________________
>
> SANS 2007 March 29 - April 6 in San Diego, CA offers 52 Courses taught

> by our top rated instructors plus a huge vendor tools expo.
> Register Today! http://www.sans.org/info/2501 (BROCHURECODE: ISC)
>
_________________________________________

SANS 2007 March 29 - April 6 in San Diego, CA offers 52 Courses taught
by our top rated instructors plus a huge vendor tools expo.
Register Today! http://www.sans.org/info/2501 (BROCHURECODE: ISC)




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