On Saturday, February 25, 2006, 11:23:39, David Gregg wrote:
...
1) mxGuard DNS tests are much better than IMail's built-in tests.
IMail checks only one IP/HELO (the last one used to connect to your
server).
Which of course is the only one that has any real meaning.
Not true. many folks have mx machines in front of their IMail servers thus
defeating any dns based anti-spam tests IMail offers.
In addition, just because the last machine to connect to yours was clean is
no guarantee that the servers connecting to it were clean. That's why we
check them - and find enough about them to successfully identify messages as
spam.
mxGuard checks all of the IPs/HELOs of all servers used in the deliver
of the message.
And does what with them? It could be a chain of 'internal' servers
unresolvable and unaccessible from the outside world.
We are smart enough to exclude hceking HELOs associated with private IPs and
HELOs taht are not fully qualified hostnames :)
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Regards,
David Gregg
dgSoft Internet Services
+1 (949) 584-1514
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