Recipient Filtering and Tarpitting - any tips?

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We use the latest version of GFI MailEssentials for SPAM filtering, and are
looking to enable Recipient Filtering and Tarpitting on the Exchange Server
to solve the current issue we have which is remote mail senders not
receiving NDRs when they mistype an email address. I've read through:

http://support.microsoft.com/kb/823866/en-us (regarding Recipient
Filtering)

and

http://support.microsoft.com/kb/842851/en-us (regarding tarpitting)

It seems simple enough, but I was wondering if some of those here could
comment on any gotchas I might encounter. Any performance issues, or
potential for lost mail or anything like that? It seems as if we should
actually gain some performance back since we'll no longer be processing much
of the junk that our Directory Harvesting filter is dealing with now. We
have a fairly simple single server setup.

Thanks for any comments!

Exchange 2003 Enterprise SP2 on Windows Server 2003 Standard SP1




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Relevant Pages

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