hello there,
i am writing a custom filter tool and i am looking
for a way to verify that the recipient address is
valid--as far as postfix and it's aliases and all
it's maps are concerned. probably something like
a command line client for verify(8), or a program
to somehow evaluate that the condition
smtpd_recipient_restrictions = reject_unverified_recipient
is fulfilled.
i am not sure if spamassassin or the other spam filters
are doing something like this, the postfix documentation
is quite explicit about verify(8) being very slow on heavy
traffic sites, but this functionality would be very useful
for greyfiltering/greytrapping as well.
going over the logs to see if rcpt is valid is not good
enough for me, because i have strict smtpd_helo_restrictions:
smtpd_helo_restrictions =
permit_mynetworks
check_helo_access hash:/etc/postfix/helo_checks
reject_invalid_helo_hostname
reject_non_fqdn_helo_hostname
reject_unknown_helo_hostname
and legitimate but misconfigured servers are caught by this
before the recipient is verified. i'd like to go over the
logs and catch these false positives to whitelist them. one
of the signs of these false positives would be to see if the
recipient is legitimate.
thank you for any pointers.
-f
--
instant human: just add caffeine, alcohol, and nicotine.
