(no subject)

John D. Kerr ( john.kerr@peel.com )
Fri, 05 Dec 1997 19:35:13 -0500

Email Relaying Restriction

Over the past few days, our systems have been used as a relay host for
subscribers of other services (in the most recent case - CompuServe) to
forward out hundreds of Spam messages. This action has put a tremendous
load on the servers, and generated hundreds of failed attempt message to
the administrator (me!).

We are running the latest release of Post.Office (v3.1.2) and it offers
features to block/eliminate this type of activity (at least they claim this
in their adverts). I have reviewed the options available, and there are
many - but I have not quite figured out the best solution for our setup.

What I think is the best solution, which I think would solve my problem is
as follows:
- Allow mail from ANY outside domains to flow freely into domains hosted on
our mail server. This would mean blocking any mail not for local domains.
- Allow mail from ANY IP addresses on my local domain to flow out freely.

This sounds like a simple solution to me, but I cannot figure out how (or
even if this is possible) to do with Post.Office. Has anyone any experience
in this type of configuration with Post.Office?

My second question, also around Post.Office, is whether I can have all
messages which go to the Mail Administrator (error messages) go into a NUL
device?? I really don't want to have to look at all the error messages on
the Mail Administrator account daily, nor do I want to be forced to clear
out message from the "Deferred Mail", "Handle Error Messages" system
administrator option.

Any advice on these situations would be appreciated.