Dear Postfix Jedi, I need your help to secure a new postfix server against the SPAM flooding.
Currently I have an old postfix based on an old debian server and since some days, my server is subject to the SPAM flooding (+- 50k mails/hours). So, I have decided to reconfigure a new server with an updated distribution, because the old distribution is not supported by debian (too old). For this new server, I think to use 1. SASL (authentication) 2. TLS for the SMTP server. 3. use the smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetwork 4. I use pgsql server for the domains and the mailboxes. 5. postgrey and some rbl servers I have some questions, 1. is it enough ? (I think no, but if you have advice, I'm very interested) 2. do you know some "secure" and "efficient" rbl servers ? 3. Do I have to use SPF in my ns ? Thank you for your advice. Regards, Stéphane
