qmtp and spammers.

[Faried Nawaz]

QMTP may be faster than SMTP for sending mail, but it seems less powerful in
our spam-happy Internet era.  How would one go about rejecting incoming QMTP
mail?  The protocol suggests that there is no way of writing some equivalent
of rblsmtpd.  The shipped qmail-qmtpd.c in qmail 1.03 doesn't even read
control/badmailfrom.

This means that servers running QMTP will have to do more processing after
accepting mail to weed out spammers and other undesirable mail senders.