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

Seth Tregenna seth.tregenna at googlemail.com
Sun Jan 28 09:02:53 GMT 2007


Hi Tim,

It might be worth having a look at the following MS article -
http://support.microsoft.com/kb/257265/en-us it'll give you a good
checklist.
Are you sending out via a Smarthost or via DNS?

Regards,

Seth.

On 27/01/07, 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...
>
>
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>
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