> The task: if mail has some passphrase in subject (eg [passme]),
> then do not apply greylistnig, RBL etc and transfer a mail to LDA.
If you whitelist based on a string in the message, then why not
whitelist based on a string in the RECIPIENT ADDRESS? Postfix
supports address extensions, like this:
in main.cf:
recipient_delimiter = +
# Alternative: recipient_delimiter = -
smtpd_recipient_restrictions =
permit_mynetworks
reject_unauth_destination
check_policy_service xxxxx
reject_rbl_client yyyyy
...
in SMTP:
RCPT TO:<you+passphr...@example.com>
Then, the greylist daemon can reply with OK if the passphrase is
good and skip Postfix RBL checks. You can make it as fancy as you
like, such as a passphrase that is valid for only a short time, a
passphrase that is valid only for with a specific sender IP address,
and so on.
Wietse
