Re: Score based on MX of evelope / from domain?

On 2025-11-07 at 02:45:46 UTC-0500 (Fri, 7 Nov 2025 08:45:46 +0100)
Benoît Panizzon <[email protected]>
is rumored to have said:

> Hi Jimmy
>
>> If you have the necessary access to add plugins, the solution 
>> involves
>> creating a custom plugin specifically for this checking and filtering
>> functionality.
>
> Oh wow, great! Thanks a lot for that template!

A plugin is a fine solution for cases where the MX isn't a perfect 
spamsign, but it is also possible for small numbers of bad MXs to handle 
this absolutely outside of SA such as with check_sender_mx_access in 
postfix, or less elegantly through hosts file entries mapping the MX 
names to something your MTA will recognize as bogus.

The advantage to doing that outside of SA is that it allows you to 
reject spam that you don't bother to actually receive.

-- 
  Bill Cole
  [email protected] or [email protected]
  (AKA @[email protected] and many *@billmail.scconsult.com 
addresses)
  Not Currently Available For Hire