E-mail has become the subject of much abuse, in the form of both spamming and E-mail worm programs. Both of these flood the in-boxes of E-mail users with junk E-mails, wasting their time and money, and often carrying offensive, fraudulent, or damaging content. This links help in the efforts to stop E-mail abuse and ensure that E-mail continues to be usable in the face of these threats.
- BlackList checker Check if the domain is blacklisted by Open Relay DataBase (ORDB) or Distributed Sender Blackhole List (DSBL).
- Fight Spam on the Internet!
- Coalition Against Unsolicited Commercial Email
- Spamfo.co.uk Covers the latest news on junk email, scams, fraud, legal aspects and reviews of software and services out there to help you reduce the ‘spam’.
- California lawyer who sues spammers
- Address Munging FAQ: Spam-Blocking Your Email Address
- Challenge/Response at the SMTP Level: It may be possible to implement a challenge/response SPAM protection system using custom SMTP Delivery Status Notifications (DSNs) that include an HTML confirmation hyperlink.
- Countering Spam by Using Ham Passwords (Email Passwords)
- “Countering Spam with Ham-Authenticated Email and the Guarded Email Protocol” describes a challenge/response system
-  A GPL’ed minimal CAPTCHA C/R system.
- Spam-proofing the mail system; Linux Weekly News; December 17, 2003.
- Alternative way to hide email addresses on web sites with inline CSS
- Hiding Email Addresses A comprehensive list of methods on how to hide email addresses in source code from spam bots.