Hi;
What is the best
way to block email from Senders that do not exist in our
domain?
e.g.
we have received
several spam from:
none of
these users exist. We have a weight for VALFROM test from IMail but other
than REVDNS which is not controllable for those on the road how can a test be
defined that adds weight for users that do not exist in our database of
users?
We can
define a filter for MAILFROM - I guess one way is elevate all domain emails and
then negative weight a filter of valid emails. Any other
way?
Regards,
Kami
