RE: Exchange Relay - UPDATED Reply (hit send to ea rly....)

  • From: Chris Wall <Chris.Wall@xxxxxxxxxxxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 3 May 2004 16:09:48 -0400

Uncheck 'All except the list below' and select 'Only the list below'

Click on 'Add' and specify only your internal IP subnet(s) and any other
approved machines for relay purposes.  This should lock you down.

Basically, the 'All except the list below' allows anyone to to relay off of
your SMTP server. 

-----Original Message-----
From: William Holmes [mailto:wtholmes@xxxxxxxxxxxxxx] 
Sent: Monday, May 03, 2004 4:01 PM
To: [ExchangeList]
Subject: [exchangelist] Exchange Relay


On an Exchange 2003 system I have configured the SMTP virtual server in the
following way:

Authentication: Anonymous access.
Connection: All except the list below, with no computers listed in the
access list.
Relay Restrictions: Only the list below, with my local subnet added to the
Access List and the Alloqw all computers which successfully authenticate to
relay Checkbox is cleared.

With this setup any host should be able to send mail to my domain, but no
one should be able to relay through my server. 

However it is still possible to relay. Any ideas on what my be going wrong?



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