(Answer) (Category) NetMAXFAQ : (Category) Certified NetMAX Addon Packages : (Category) E-Mail Suite - SpamBouncer and SquirrelMail Web Mail :
How do I update the list of hosts which my NetMAX blocks using the E-Mail Powerpack?
Turning it on is as simple as placing a check in the appropriate box on the Home->Services->Mail->Deny tab.

The hosts that get blocked are automatically updated by the various Real-Time Blackhole Lists. Each of them work differently resulting in stopping a large majority of spam by utilizing several of them.

Some of the RBLs NetMAX uses include Spamhaus, ORDB, and NJABL. Each of them keeps a list of offenders and has their own method of determining who belongs on that list. ORDB, or Open Relay DataBase, keeps a list of known open relays. An open mail relay occurs when a mail server processes a mail message where neither the sender nor the recipient is a local user. This allows spammers to take advantage of the mail server to deliver their messages. Spamhaus and Spamcop both have their own criteria to determine what constitutes a spam-source. Spamhaus states that 90% of spam comes from a group of under 200 spam outfits, and makes it their goal to keep track of the machines those outfits are using to send their spam.

For more information about a couple of the RBLs used by NetMAX, see:

ORDB
Spamhaus

address-suppressed
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