[TriLUG] mailing list server filtering setup questions

[Magnus]

On Dec 20, 2007, at 11:33 AM, Cristóbal Palmer wrote:

> The plan also has us changing this:
>
> lists.example.org.       IN       MX       10 lists.example.org.
>
> to:
>
> lists.example.org.       IN       MX       5 list- 
> filtering.example.org.
> lists.example.org.       IN       MX       10 lists.example.org.

This could bite you in the tail end.

Spammers often will use secondary MX boxes knowing that often, just  
like in this case, the secondary doesn't have robust anti-spam  
measures configured.