Powerful AntiSpam and AntiPhishing
Black List (RBL)
RBL is a DNS Server that lists IP Addresses of known
Spam sending machines. If the contacting IP is found to be in one of the blacklisted
categories, the connection is terminated.
RBLs, SURBL Check works by scanning for the presence of names or URLs of Spam
websites in the message body.
General Header Tests
the validity of all the headers in the mail and if any of the headers are found
to be invalid, the mail will be considered as Spam.
MX/A DNS Record Verification
The domain part of the email address in the "MAIL FROM" SMTP
command is checked to see if it has a DNS MX (Mail Server) and/or A (IP) record
as it is typical of spammers to use non-existent domains in their emails.
A reverse DNS check is performed to see if the connecting IP resolves
to a valid domain name before accepting or rejecting the email.
X-Spam Rules are Rules that describe certain characteristics
of a mail and they are matched against the mail header, body and attachment to
generate a score for each mail. If the score crosses a threshold value, then the
mail is considered a Spam.
Sender Policy Framework (SPF)
Policy Framework is a world standard that helps to prevent forgery of sender address
and is a powerful mechanism to stop Phishing mails.
Auto Updates for
The system updates the Bayesian Spam Database with probable
phrases and words.
Power to Block Image Spam
To evade 'word' and
'Phrases' based Spam Control and Content Scanning software solutions, many spammers
today are increasingly resorting to the use of images in their mails. The text
written inside an image is not scanned by most security solutions and hence not
caught by Spam blockers. MailScan uses powerful technologies to filter out image
Autogenerated Spam Whitelist
When a local user sends a
mail to an email address, the system automatically adds that ID to the Spam Whitelist