Author: Arthur Hagen Date: To: exim-users Subject: Re: [exim] Innovative Host Blacklisting Idea
On Fri, 2007-06-15 at 07:39 -0700, Marc Perkel wrote: >
> Renaud Allard wrote:
> >
> > Now, suppose that I am a mail administrator having some problems to
> > deliver mails to @perkel.com. If I try to telnet from my mailserver to
> > your listed MX on port 25 to try to diagnose the problem, will you
> > blacklist my legitimate mailserver because I connected to your fake MX?
> >
>
> Only if you start with the highest numbered MX records and connect 25
> times in a 3 day period.
No, it's enough that there's something wrong with *one* email that
causes your regular servers to defer it -- then it will eventually go to
the blacklist MX, and blacklist the entire mailserver.
