On Tue, 10 Feb 2004, Kris Deugau wrote:

> You're free to return something other than "250 OK" after a DATA
> segement.

> However, it *is* a bit pointless because you've burned bandwidth to
> accept the message by then.  :/

Not at all.  There are very good reasons to return 5xx after the DATA.
If by some miracle, you accidentally reject valid mail, at least the sender
receives a non-delivery notification.  On the other hand, if it really
*was* spam, at least you're not responsible for generating a bounce.

You're being a good Internet citizen by triggering a NDN, but you're being
a cautious Internet citizen by forcing someone else to generate the NDN.

Regards,

David.
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