Marc Perkel wrote:
Because there is occasionally some server doing something very weird you
might have to open up port 25 one some specific IP who is running
something really dumb. I think I've had to do this only once or twice.
But once you open up port 25 to the problem user you solved the problem.
For the most part if you do an MX sandwich as above you'll get rid of
80% of your spam and not lose good email. If you are fearful of going
all the way then just do the higher numbered MX and leave the bottom as is.
This has been interesting and I want to give this a try. What's the
easiest way to give out a "421" on a bogus MX and log the attempt?
Build a separate server? Use an existing server and run a service on
another port? I've got extra IP's but don't want to over complicate the
process.
--
Mark Johnson
http://www.astroshapes.com/information-technology/blog/
