Joseph Brennan was kind enough to share more code snippets with me which had
predisposed me against a bounce. BUT Joseph's code was originally done in
filter_begin which led to my initial worry about reject/bounce vs discard.
However, right now, I am thinking I should be able to do the invalid helo
and invalid MX check in filter_sender since I have $sender and that's all I
need. If I reject in filter_sender, I haven't received the entire email yet
and it isn't a very "costly" transaction.
Regards,
KAM
Regardless of how you feel about bounce vs drop on spams, this might be
one where rejecting should be done. This will notify the sending site
that they have hosed DNS entries. Including a link to a page with
explanation on why their DNS is fubar would be good. (That assumes the
sending host includes the rejection notice. I've been asked to diagnose
messages that only say that the delivery failed and do not include any
details. Useless!)
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