Re: [exim] Exim server behind NAT router (and HELO)

Marc Sherman wrote:

> Matt Fretwell wrote:
> >
> > Again, this comes back to my original point. If the clients admin
> > cannot be arsed to configure their system correctly, why should they
> > expect to be allowed any degree of courtesy from remote systems? What
> > is the point of making the server do what the client should have
> > already done.

> I'm curious, Matt. Would you block mail from my server? It says "EHLO
> pyloric.projectile.ca". That domain name is not resolvable outside my
> local network. It connects from an IP address that reverse-resolves to
> "projectile.ca". Here's an example Received: header (sorry about the
> wrapping):

Hell, no :) Although this subject is one of my major gripes, (and I can
whinge emphatically about it), I am also enough of a realist to know that
most forms of HELO restriction will cause more harm than good. Apart from
blatant HELO deviations, I am very lenient in my HELO restrictions. I
don't really have much choice unless I wish to block a good 15% + of smtp
clients|servers :)

As a general point, how long would it take you to add an entry in DNS to
make that a valid hostname? What reason is there not to?

I try to make sure my systems are set up in the most sociable and correct
manner, (personal RFC interpretations excluded), as I possibly can. There
really is no possible reason|excuse for doing otherwise.


Matt