Erik de Castro Lopo put forth on 3/7/2011 4:50 PM:
> Given the above data, I think I am justified in using the following
> pcre rule:
>
> /^Received-SPF:.*helo=[a-z0-9.-]+\.mail\....\.yahoo\.com;
> envelope-from=[^@]+@att.net/i REJECT
This is possibly less complex, totally effective, and provides an alternate
path for any legit email that's rejected.
/etc/postfix/blacklist
..
yahoo.com REJECT Please resend to postmas...@mydomain.tld if your email
is not spam.
..
smtpd_recipient_restrictions =
...
check_reverse_client_hostname_access hash:/etc/postfix/blacklist
check_sender_access hash:/etc/postfix/blacklist
...
In something like 3 years since implementing this, I've not received a single
Yahoo email in my postmaster mailbox. I of course manually whitelisted some
friends/family addresses, and my auto whitelist script handles yahoo addresses
for folks I send mail to.
--
Stan
