smtp-check-sender has a small bug that causes a broken
pipe when $SENDER is empty. This is easily fixed by
adding:
data = sys.stdin.read()
if len(sys.argv) < 2: sys.exit(1)
before the line that sets address_to_verify, and
deleting the subsequent read on stdin.
Also, for users who tag their envelope sender (no
reason not to, in my opinion), this small script dumps
fake bounces (where the spammer sets the envelope
sender to "<>"):
----------------------------------------
# for use with TMDA tagged envelope sender
#
# called from incoming filter file as (e.g.):
# pipe '~/bin/check-valid-bounce' drop
if [ -z $SENDER ]; then
if [ -z $EXT ]; then
exit 0 # invalid sender
fi
fi
exit 1 # valid sender
----------------------------------------
Hope this is useful.
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