Wikipedia - Captcha
Explains how captcha features can keep spammers from signing up for certain accounts online, such as email or weblogs. Explains how the system can be circumvented as well.
Address Munging FAQ
How to spam-block ("munge") your email address.
Anti Spam Email Service
Offers 128-bit encryption DES algorithm to prevent email harvesting.
Avoid Spam
Spam related news, articles, reviews, downloads and forums.
BestPrac.Org
Learn about best practices in spam prevention and eradication.
BlackSpider Technologies
Provides spam filtering and virus protection for corporate customers.
Bumpymail.com
Free e-mail forwarding accounts. Forwarding address disappears automatically after fixed time period and mail is bounced. Spammers won't be able to reach you.
DMA: EMail Preference Service
Maintains a list of opt-out addresses.
Email address encoder
Transforms ascii email addresses into their equivalent decimal entity through the use of Character Entities.
Email Harvesting: How To Protect Yourself
Describes the software spammers use to harvest email addresses and send spam; includes simple strategies for preventing an address from being misused.
Email Protector
Hides email addresses from the spambots by using encryption and Javascript.
Email Redirection Technique
Step by step explanation of the email redirection technique to prevent spam from reaching to the end user.
Emailias
A service that allows you to generate new e-mail aliases to give to websites that want contact information.
False Address
Offers anonymous email forwarding addresses.
Fighting spam using Eudora
Tips for configuring Eudora to block spam.
Graphic @ for Spam Prevention
Prevent e-mail siphons from harvesting your e-mail address by not using the commercial "@" character when displaying your e-mail address on a Web page; use a graphical "@" instead. Examples in Perl, OpenACS, PHP, and ColdFusion.
How Do Spammers Get Email Addresses?
Twelve ways spammers obtain email address. Includes links to websites explaining how to trace spammers down.
How do spammers harvest email addresses?
Several methods are described.
How to Block E-mail Relaying
What to do when your computer is used to relay spam.
How to Stop Messenger Spam
Explains how to stop web pop-up spam advertising in Windows Messenger.
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