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paddy wrote:
Suppose I am offered mail for usera(_at_)example(_dot_)org and
userb(_at_)example(_dot_)org
Say, for example, usera wishes to receive .exe attachments, but userb
must not. Is there a scheme something along the lines of tempfail
after data, remember the transaction, tempfail the second user
at rcpt time next time around, to cause the mail to split.
(if that works then presumably you could simply always force seperate
delivery to users with different content filtering settings, but that
may be undesirable) Is this what lmtp is intended to address?
I don't know about LMTP, but Sam Varshavchik, the author of Courier MTA,
has proposed (and implemented in Courier) an SMTP extension that allows
separate responses to DATA for each recipient:
http://www.courier-mta.org/draft-varshavchik-exdata-smtpext.txt
It seems reasonable but unfortunately isn't implemented widely.
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