I need to set up a "blacklist" of sorts on our mail server. One of
our client servers handles approximately a million emails a day and
we've been experiencing some delivery delays. In addition, we
occasionally get blocked for SPAM and while getting unlisted is easy,
I'd like to find more ways of preventing it. Is there a means of
setting up a file that postfix will check before delivery? I don't
want to restrict based on domain, but rather by address and I would
prefer not to use my alias file to move bad addresses to /dev/null.
Because our client base is so varied and in many cases we don't have
access to the email database, I need to try and find alternatives on
the mail server itself.
For example, lets say one of our client's users signed up for
notifications on a particular service, but she's new to it all and
she types in the wrong address. Our application system sends an
email to the user and it bounces back from the ISP as undeliverable
because of a bad address. How can prevent mail from being delivered
to that bad address in the future? So if [EMAIL PROTECTED] comes back
as a 450/550, I want to be able to block mail sent to
[EMAIL PROTECTED] but not block any other mail that may be going to
yahoo.com
I've taken a look at http://www.postfix.org/postconf.
5.html#smtpd_client_restrictions but I'm not sure how to apply it for
what I need, can anyone advise me on how to set this up? (I've also
looked at http://www.postfix.org/ADDRESS_VERIFICATION_README.html;
but the README states quite clearly that this feature is designed for
low traffic sites)
Thank you very much
- recipient restriction on known address? carconni
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