Re: IIS 5's SMTP and Stopping NDR's ?

What's happening is that a lot of people
send SPAM to my server (to non-existent addresses)...

There is little reason for a contemporary MX to accept mail for non-existent addresses. Your problem starts there. What is it that prevents you from loading a recipient list and using a transport event sink to reject at the connection level?

The issue of suppressing NDRs -- accepting, then later bit-bucketing, messages firmly identified as spam -- is different. That's the "Bouncing spam is bad netizenship/bouncing spam makes you complicit in Joe Jobs" vs. "Not bouncing undelivered messages breaks the RFCs/you can never be sure enough of spamminess" debate. *That* debate has swung strongly in favor of the first position for several years.

--Sandy

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