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White Lists
MailScan for Linux allows you to create a White List of
clean domains and users. In addition there is a list of ‘Spam
phrases’. Mails with such phrases should be blocked. The
software allows you to apply a severity level to the phrases
from low to high. This allows you to control how Spam is identified.
Figure 1 shows a screen from MailScan for Linux, the top
selling Anti Virus and Anti Spam software with features of
White Lists and Spam Phrases.
Figure 1. White Lists and Spam Phrases
(click on the image for bigger view)
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RBL and DUL Controls
MailScan for Linux should have a list of RBL and DUL to
verify a users authenticity.
MAPS (Mail Abuse Prevention System) provides a list of IP
addresses that are known Spammers or allow spamming. This
list is called as Black hole list. When your server, receives
a mail from a domain, not on its allow domain list, you can
send a query to MAPS Server which verifies the IP.
Spammers sometimes use stealth mail tactics when their initial
Spam attempts are blocked. They use a Dial-Up-Service
(DUL) provider to connect their Spam mail service, to the
server. This is trespassing on your MailServer and the MAPS
DUL project helps in identifying and stopping Spam. The project
has a list of DUL users who are known Spammers. To verify
if the request for connection to your Server is genuine, you
can send a query to dialups.mail-abuse.org. The request is
verified and returned.
Figure 2 shows a screen from MailScan for Linux, the top
selling Anti-Virus and Spam software for Linux mail servers
with features of RBL and DUL.
Figure 2. RBL and DUL features
(click on the image for bigger view)
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Block Spammer with black listing
Another way to beat a Spam is to refuse entry to e-mail
IDs and Domains that are known Spammers. MailScan for Linux
allows you to create a Black List of such users and domains.
Software with the following features effectively combats Spam.
- Add e-mail ID of known Spammer to the block list. Any
mails received from an ID, included in the list are automatically
deleted, without being downloaded into your server.
- Add domains of known Spammers to the black list. Any mails
received from such domains are automatically blocked, without
being downloaded into your server.
Figure 3 shows a screen with from MailScan for Linux, the top
selling Anti Virus and Anti Spam software, with features to
create Black lists.
Figure 3 Black List of Users and Domains
(click on the image for bigger view)
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