Michal Jankowski wrote:
There are two users - user A and user B. User A wants to receive
everything, user B wants to have all spam mail rejected (with
action_bounce, so in case of a false positive the sender is notified).
There comes a mail addressed to both A and B. What should mimedefang
do?
1. Bounce
Pro: B doesn't get unwanted spam
Sender is notified
Con: It's not delivered to A
2. Deliver to A only
Pro: B doesn't get unwanted spam
A gets everything
Con: The sender thinks they both received it
3. Deliver to A and B
Pro: A gets everything
No problem with false positives
Con: B gets unwanted spam
4. ?
Any ideas?
Michal,
It seems to me like the 'most ideal' option would be 1. I say this
because if someone sent mail to A & B that got scored high enough to be
bounced but it wasn't actually spam, then at least the sender is
notified that it got rejected by the filters and they can fix the mail
and send again.
2 would be my second option if A didn't accept the fact that if the mail
scored high enough to be bounced that the likelyhood of it being spam
outweighed the likelyhood of it being a FP. The problem is that if it is
a FP in scenario 2, nobody knows and thus the problem can't be fixed.
3 would be the 'safest' option in the fact that no mail is being
rejected or discarded, but it's certainly not an ideal installation. It
would bring up the "why do we even have a spam filter anyways?" question
from B quite often I would think.
I personally do global rejection if the mail scores above a certain
score, otherwise I add spam headers and pass it on to the user to do
with as they please (i sort mine into a spam folder).
To date I've had 0 complaints about it and nobody has contacted me
saying "my mail got rejected, why?" (that doesn't necessarily mean that
someone hasn't thought that but just not known how to get ahold of me,
however)
so, that being said, i'd choose door #1.
Alan
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