Another approach to reduce SPAM would be to use fail2ban for a
"reasonable" period to shut out IP addresses for a "reasonable" period
that are sending a "lot" of SPAM in a "short" period.
Ron
On 23/04/2014 3:56 PM, Larry Stone wrote:
On Wed, 23 Apr 2014, James B. Byrne wrote:
Does the idea of configuring Postfix so that external (to our
network) smtp
connections are only accepted from servers identified with MX records
for the
connecting IP address make any sense? Is it possible?
No, it makes no sense at all. MX records define what hosts RECEIVE
mail for a domain. They say nothing about what hosts should be SENDING
mail for a domain. Many large ISPs use separate systems for receiving
and sending mail. What you want to do will reject large quantities of
legitimate mail.
-- Larry Stone
lston...@stonejongleux.com
--
Ron Wheeler
President
Artifact Software Inc
email: rwhee...@artifact-software.com
skype: ronaldmwheeler
phone: 866-970-2435, ext 102
