2 anti-spam – AirLive ES-6000 User Manual

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6.2 Anti-Spam

ES-6000 can filter every incoming and outgoing e-mail. Users will no longer receive plenty of spam which

saves your precious time for work rather than waste your time on taking the business e-mails out of spam. It

also lowers the risk of deleting the business e-mails when deleting spam.

6.2.1 Setting

Anti-Spam Setting

You may view or configure the settings of e-mail inspection.

E-mails exceeding the threshold score can be added a warning message and a score tag to the subject,

whereas others below the threshold score can only be added a score tag in the subject line.

The approaches of inspection:

Check spam fingerprint

: Generates an ID number by analyzing the e-mail with algorithms, and

then compare it to the spam ID list on server.

Enable Bayesian filtering

: Compares the e-mail header to the Bayesian database.

Enable spam signature push update

: Generates a value by analyzing the e-mail with algorithms,

and then compare it to the spam signatures on database.

Greylist Filtering

: Drops the session created by the first incoming e-mail.

Check if the sender’s IP address is on Real-Time Block List

: Compares the sender IP address

to the blacklist on server.

Enable email spoofing detection

: Checks whether the domain engaged in the execution of

SMTP HELO / ESMTP EHLO commands is identical with that of the sender’s address.

Check the validity of each sender’s account

: Uses probing packets to detect the validity of a

sender’s account.

Auto-Whitelist

: Automatically whitelists the subnet belonging to senders based upon a mean

spam weighting accumulated from previously sent email.

Enable Sender Policy Framework (SPF)

: Checks whether the sender’s IP address is identical

with the one specified in the DNS SPF record.

Enable DomainKeys

: Verifies the domain of an email sender and the message integrity.

ES-6000 uses default settings to filter spam upon no approach being taken.

Bayesian filtering works not until database has accumulated 200 spams and 200 hams.