Re: best practices for fighting spam with Debian?
On 2016-12-15 10:41:58 +0100, Sven Hartge wrote:
> Next is a check if the sending IP resolves correctly and the hostname
> resolves back to this IP.
^^^^^^^^^^^^^^^^^^^^^^^^
I wonder whether this rule should really be used. A hostname may resolve
to multiple IP's, and for some reasons, the original IP may not be in
the list (e.g. if truncated).
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
Reply to: