RE: looping address

[Karl Greenwood <Karl () pt-services co uk>]

hi,

ive had looping emails before where exchange is pretending to be the mail
server for a domain it recieves the mail and forwards it to itself rather
than the hidden mail server due to the way the domain name is
resolved...exchange should notice this and delete the email after a few goes
round

it shouldn't be a cause of concern if relaying is disabled, email to any
domain - localhost.net or whatever - will be rejected and only mail to your
valid domain is processed.

> -----Original Message-----
> From: jwalsh () internoded com [mailto:jwalsh () internoded com]
> Sent: Wednesday, November 03, 1999 8:41 PM
> To: firewall-wizards () nfr net
> Subject: looping address
>
>
> I found an smtp server in a loop attempting to deliver to 
> user () localhost net,
> which interestingly resolved to 127.0.0.1.  I think I can 
> prevent this in my
> environment, but I thought it was an interesting hack that 
> I'd bet could cause
> some concern.  Has anyone encountered this, and is it NT 
> specific?:-jmw