We can help protect you against new virus
attacks, before your anti-virus software can detect them! It also
includes pre-scanning, allowing you to scan much more E-mail (by
eliminating the need to scan safe HTML E-mails that would normally
need to be scanned, yet still scanning potentially dangerous HTML
E-mails). The systems we have in place are recommended for over 1,000 users and/or over 20,000
E-mails/day We offer true Enterprise mail service any mail server
requiring the highest level of virus protection. Your mail is
opened by the software inspected for potentially dangerous strings
are trapped even before the mail has a chance to enter your
system. Also from a business standpoint this should be a standard.
All inbound and outbound mail is scanned to avoid someone in your
organization from unwilling sending such an email. We actually
scan each mail with Three different Virus Software applications
which are updated automatically. If you are serious about security
and who isn't you must know that the way the hackers come in is on
the trail of something legitimate. Mail is the one place that is
the hardest to secure. Most Trojans are actually inserted using
emails. After all what good is a firewall that must allow email to
pass through it?
Junk Mail Filtering:
Tired of being target of useless mail? Spam costs money and time. So if you are serious about what you get in your mail then this is the only mail server for you.
Each mail is scanned against (over 35) spam lists. Anyone who has ever used filtered mail knows that it is as nice as it gets. No system is perfect but, this is the best technology available today.
We weight the return address and RFC compliance and if it has a high probability of spam our system tags the email with the word SPAM: you can then set a filter to either direct it to another folder or send it to the bit bucket.
Now we had to use conservative settings here but this will block over 60% of those useless emails. We could have and may adjust the weight as time goes by but we want to be sure legitimate emails do not end up in the trash.
This is why we have simply added this to the subject. Of course this software gives you the flexibility to be more strict in that it adds information to the headers as some of the issues found are traced.
You can build filters or Rules on these headers and remove even more trash mail before you have to sort it. " Defining Rules "
Tests We run against each email :
-
MAPS RBL :
This used to be the most popular test, used by many large ISPs. It tries
to block sources that allow spam to be sent through their servers, and do
not do anything to prevent it. It now requires a subscription from
mail-abuse.org.
-
Envelope Mail From: This tests
the "From" address as listed in the SMTP envelope, to make sure that the
domain has an MX or A record. Or, if you want to be super strict, you can just
check the MX record.
-
MAPS DUL :
DUL has a list of many "dial-up lines", or IP
addresses of people connecting with a modem. Most spammers use a
dial-up connection to connect to an innocent mail server
(possibly yours!) to do the dirty work. This doesn't trap much
legitimate E-mail, since those usually will go through a real
mail server. It now requires a subscription from .
-
OS RSS : OsiruSofts Open Relay Spam Stopper. Another list of
spammers' IP addresses. Includes 5 different databases.
- Reverse DNS : Checks to make sure that a reverse DNS
entry exists for the IP address sending you the mail. The RFCs
require a reverse DNS entry, and lots of spam is sent from IPs
without a reverse DNS entry. However, there are quite a few
legitimate mail servers set up without a reverse DNS entry.
-
No Postmasters:
This database lists domains that do not have a postmaster addresses (which
violates RFCs).
-
No Abuse : This database lists domains that do not
have an abuse address, which also is required.
-
Bad Headers :
Looks for broken E-mail headers, that are common in spam as spammers try
to forge headers. This test can't accidentally catch any legitimate mail
(except mail from broken E-mail clients, probably beta versions).
-
Spam Routing :
Looks for E-mail that takes a very poorly
defined path that wastes bandwidth. For example, a U.S. spammer sending to
a recipient in the U.S., but relaying through a server in China would
trigger this test.
-
Weighting :
This unique test (in the latest beta version
of JunkMail) assigns each of the other tests a weight
(which you can change if you like), and once an E-mail fails
enough tests to reach a certain "trigger" value, the WEIGHTING
test will mark the E-mail as spam. This will allow you to use
tests that have high false positive rates, while not worrying as
much about losing legitimate mail.
Complete
Virus Removal and Filtering
