Non-Account Bouncing

[TweakMYbox]

Anyway to configure Exchange Server 2003 to reject messages destined to non mail-enabled objects?

Would save me a lot of hassle. Thanks in advance!

Mike Fegan, MCSE

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[FrogEater]

Hello,

You have an option in the global organisation-delivery I believe to perform an AD lookup at connection time (you have then to active the filter on the Virtual SMTP server).

Any server trying to send a mail to a SMTP address not know to your AD will see the connection closed. The mail does not enter your organisation.

See Here :

http://technet.microsoft.com/en-us/library/aa997249.aspx

and select "filter recipient not in directory"

 

[58sniper]

Recipient Filtering does that. But you also want to enable tarpitting to avoid a brute force attack.

The Hidden Power of Sender and Recipient Filtering

http://www.msexchange.org/tutorials/Sender-Recipient-Filtering.html

SMTP tar pit feature for Microsoft Windows Server 2003

http://support.microsoft.com/kb/842851

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP
Want to know how email works? Read for yourself -

http://www.ietf.org/rfc/rfc2821.txt