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What is Megaphat Philter Gateway?
Megaphat Philter Gateway is a software product
that is installed on your Windows-based operating
system. MPG works as a system service and
it may be installed on either your incoming
mail server or another remote server such
as a firewall server or other Internet accessible
computer. The purpose of Megaphat Philter
is to block potential unsolicited bulk email
and junk email. Figure 1 best demonstrates
1 (click to enlarge)
What is an Incoming Mail Server?
When email is sent, it is received by a mail
server, known as an SMTP (Simple Mail Transport
Protocol) server. This is considered to be
your Incoming Mail Server.
What is meant by a Remote Server?
A Remote Server is another server which may
not necessarily be your primary Incoming Mail
Server. This Remote Server may be used for
other purposes, act as a spare server or even
How exactly does MPG work for me?
Megaphat Philter Gateway uses a technology
called DNSBL. MPG determines which email may
be unwanted (spam) or potentially dangerous
(contains virii, trojans, adware, etc) based
on where the email originates from as well
as enforcing RFC guidelines (which are not
enforced by many junk mail senders), then
prevents that email from being delivered to
your mail server. When MPG blocks the reception
of this unwanted mail, you save bandwidth
expense at preventing the actual connection
and data throughput. Also you save at the
expense of your mail server not having to
receive large amounts of unwanted mail, processing
power, storage resources and the resources
at the recipient computer as well. Figure
2 demonstrates how Megaphat Philter communicates
with DNSBL databases and determines legitimate
2 (click to enlarge)
What if the mail being sent is legitimate
and MPG blocks it?
It is possible that the DNSBL databases list
the originator of legitimate email as spam.
In cases such as this, you may inform MPG
that the originator is legitimate by including
their IP address into a "whitelist",
which is instantly approved for delivery by
MPG. Alternatively if it a network block,
you may assign the entire block to the whitelist.
What if I use MPG and it does not block
Not all spam can be blocked, but as a good
countermeasure, using a technology such as
MPG certainly reduces the quantity significantly.
There are over 200 different DNSBL databases
and if one specific database does not have
an sender address listed, you can certainly
configure MPG to use another one which may
have it listed. Alternatively you can instruct
MPG to "manually block" a specific
originating IP address or an entire network
class to avoid searching for a database which
may contain that entry.
I am using the trial edition of MPG now
and MPG stopped blocking. Why?
The trial edition is effective for 30 days
then it expires. Once it expires, it no longer
blocks any messages that may be otherwised
How many domains does Megaphat Philter
Megaphat Philter supports as many domains
as the SMTP server that Megaphat Philter redirects
to. Megaphat Philter is not based on a per-domain
license or a per-user license. Megaphat Philter
is based on a per-server license. This means
that Megaphat Philter will allow any number
of connections for any number of domains with
any number of users, so long as the redirected
SMTP server supports the services.