SPAM filter and open relays
The Spamers worst
nightmare. Spamer have a problem sending out
millions of emails. Their ISP usually does not
allow to email unlimited emails though their
relay. Spamers have to find other ways to do
it. What they are looking for is an open relay.
Mostly an ISP or a company mail server that
is not protected. Once found they will not only
used it but tell others about it. But they are
not the only ones looking for open relays. Several
organizations do the same but for a very different
reason. They know that the spamers send out
spam through these relays. They find the relay
compile a list. These lists are made available
to the public. Some of them are free others
are commercially available.
Xwall uses the
SLS, RBL. Spamlist or whatever you may like
to call them. You can add your favorite lists
or use the predefined ones. An important feature
of Xwall is the Exclude List. It allows you
to exclude your business relations from the
SPAM test in case they are on a relay list.
While Xwall makes
full use from the SPAM relays it also includes
the tools to make sure you do not end up on
one of the lists. Xwall protects it's own SMTP
relay several different ways including ip address
restrictions and authentication local or NTLM.
