Keld Jørn Simonsen wrote:
On Sun, Jul 12, 2009 at 05:45:37PM +0200, Ralf Hildebrandt wrote:
* Keld Jørn Simonsen <k...@dkuug.dk>:
Hi
I am fooling around with my postfix, and I wanted to reject mail without
a valid MX record. How to do that?
reject_unknown_sender_domain
Maybe this idea???
%cat mx_access.cidr
0.0.0.0/8 reject mail server in broadcast network
10.0.0.0/8 reject mail server in RFC 1918 private network
127.0.0.0/8 reject mail server in loopback network
169.254.0.0/16 reject mail server in link local network
172.16.0.0/12 reject mail server in RFC 1918 private network
192.0.2.0/24 reject mail server in TEST-NET network
192.168.0.0/16 reject mail server in RFC 1918 private network
224.0.0.0/4 reject mail server in class D multicast network
240.0.0.0/5 reject mail server in class E reserved network
248.0.0.0/5 reject mail server in reserved network
smtpd_recipient_restrictions =
permit_mynetworks,
...
...
...
check_sender_mx_access cidr:/etc/postfix/mx_access.cidr,
Disclaimer:
Please note I may have no idea what I am talking about here.
--
J.D. Bronson
