[ i tried to send this before, but something went wrong, and ken's
moving so fast these days, i feel compelled to resend asap. :-) ]
You say that like it's a bad thing! :-)
- if there are multiple addresses in From:, then require at least
one of Envelope-From: or Sender:. create a Sender: from
Envelope-From: if necessary, to satisfy the RFC.
- Choose the SMTP envelope header from
1) Envelope-From:
2) Sender: (no "iff" -- i don't think there's a need for that)
3) From:
Hm. You know, I like this (and it seems that there is widespread agreement
that Sender: should always override From:).
There is one wrinkle: Right now Envelope-From: can be blank; if you
do that, then you will get a MAIL FROM:<>, which is useful if you
don't want any bounces at all. Sounds like the logic should be if
you have multiple From: addresses then Envelope-From: cannot be
blank. Actually, now that I think about it I might have written the
code that Sender can be blank, so I should fix that :-)
--Ken
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