spam filter

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spam filter

A software routine that deletes incoming spam or diverts it to a "junk" mailbox (see spam folder). Also called "spam blockers," spam filters are built into a user's email program. They are also built into or added onto a mail server, in which case the spam never reaches the user's mailbox. See email program and mail server.

Spam filtering can be configured to trap messages based on a variety of criteria, including sender's email address, specific words in the subject or message body or by the type of attachment that accompanies the message.

Blacklists and Whitelists
Address lists of habitual spammers, known as "blacklists," are continuously updated by various organizations and ISPs. Mail from blacklist addresses is rejected at the mail server. See Blacklist of Internet Advertisers.

The opposite approach is taken to ensure that bona fide mail is not automatically rejected. Users or network administrators can create a list of allowed email addresses, known as a "whitelist," and the mail client or mail server will always accept mail from whitelist addresses. Mail client software typically treats the user's address book as a whitelist, presuming that mail coming from an address maintained by the user is always valid.

Analyze the Content
In order to more effectively analyze the content and not trash a real message, sophisticated spam filters use artificial intelligence (AI) techniques that look for key words and attempt to decipher their meaning in sentences (see Bayesian filtering). See spam trap, spam relay and spamdexing. See also ad blocker and popup blocker.
References in periodicals archive ?
Many new spam blockers use a method called white listing, which means that you must grant permission for e-mail to enter your in box by pre-approving specific senders.
With people this day in age fast forwarding through commercials, putting up spam blockers, and disregarding direct mailings, it is a necessity for them to find a strategy that works- that's where Taylor Made Marketing comes in.
And while we encourage our members to keep up with their spam blockers and virus protections, there's no way to ensure that that's going to happen.
SPAM blockers use various methods to identify and manage SPAM.
But along with the increasing popularity of e-mail marketing efforts has come concern over the evils of spam blockers that may be keeping our efforts from reaching the electronic inboxes of prospects.
(3) Use SPAM blockers and other features which automatically delete junk If you're like me, about 15 percent of the day's e-mail touts cures for pattern baldness or male "virility" enhancements.
And make full use of spam blockers to greatly reduce the volume of unwanted e-mail landing in your inbox."
Consumers have hit the gag point for absorbing our messages and trusting our purpose, and have become pros at ignoring us, abetted by technology such as TiVo, spam blockers, caller ID and plain old indifference.
This issue quickly became one of the biggest challenges in spam-fighting for 2006 since it is difficult for spam blockers that rely on content identification to decode text embedded within images.
Investing in up-to-date antivirus protection, spam blockers, and firewalls is another strategy.
With the right tactic, you can create e-mail alerts that will get past your customers' spam blockers.