RE: How to prevent unauthorized use of my SMTP server?
- From: "Mark Fugatt" <markfu@xxxxxxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Mon, 8 Aug 2005 20:50:41 +0100
By default Exchange 2000 and Exchange 2003 do not allow unauthorised
relaying, this article explain how to check:
http://www.msexchange.org/tutorials/MF005.html
Mark Fugatt
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Microsoft Services Organisation
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-----Original Message-----
From: Nicolas Verhaeghe [mailto:nicolas@xxxxxxxxxxxxxxxxxxx]
Sent: 08 August 2005 18:45
To: [ExchangeList]
Subject: [exchangelist] How to prevent unauthorized use of my SMTP
server?
http://www.MSExchange.org/
How do I make sure that my SMTP server is not open to the rest of the
world?
It seems that I need to have port 25 opened in my firewall to allow
incoming mail, but when I do that, don't I risk letting outsiders use my
SMTP to send their spam?
How can I monitor this activity and also how can I make sure that no
non-authenticated users use my Exchange server?
Thanks a lot!
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