• Mozilla and the stand-alone Thunderbird: e-mail programs (“clients”) with a Bayesian filter, i.e. a filter that keeps learning and is therefore able to adapt to the constantly changing forms of spam

• Disposable e-mail accounts, various types for registering on web sites etc.
  • E4ward.com You can use your own domain name or e4ward.com for your aliases
    Sneakemail original disposable email address service
    Spamgourmet expire after a number of emails, but can be reset or ignored for some senders
    Jetable expiring in 1-8 days
    Mailinator instant email accounts, self-destructing email after you read it.
    shortMail.net expiring email forwarding accounts, and instant anonymous online email
    SpamDay allows you to create forward addresses and webmail addresses, valid for 24 hours. Support for RSS feed!
    SpamMotel Use it whenever you are required to give out your e-mail address on the internet.
    ipoo.org Signups without spam. Fast, no ads. Includes RSS to check your SPAM inbox.

• Tools to filter out spam
  • Bogofilter Statistical filter (not strictly Bayesian)
    Firetrust MailWasher Pro. Removes spam while it is still on your POP3 server.
    Hexamail Guard – Anti-spam gateway software
    iMailLight smart plugin for Outlook, based on Bayesian filtering
    SpamAssassin heuristic filter
    CRM114 Uses a hidden Markov model to classify spam
    SpamBayes Bayesian filter using ideas improving Paul Graham’s ideas.
    Spamihilator Free antispam program with a good-working bayesan filter and a lot of other filters plugins. It works with almost all email program.
    SpamPal Free Windows filter with lots of filtering methods. Client or server-side filtering.
    TMDA, a challenge/response system
    trimMail Inbox – Anti-spam firewall
    Checksum-based filter:
    Distributed Checksum Clearinghouse
    Vipul’s razor

• Tools to filter out viruses
  • Clam antivirus
• Contact forms that hide email addresses
  • Contact Form – Open source (GPL) – Requires a webserver, Perl, and Sendmail
    form2mail – Open source (GPL) – Requires a webserver, PHP, MySQL, and SendMail
    MailWebForm Open source (GPL)- Requires Java, Java Servlets, and Java Mail
    SCForm – Open source (GPL) – Requires a websever, PHP and Sendmail
• Other tools
  • Sam Spade program with tools
    SpamCop a place to report spam
• Services which guarantee messages as not being spam:
  • Habeas Sender Warranted Email
    Bonded Sender

• Making it harder to harvest e-mail addresses
  • Project Honey Pot
    address-protector.com A service to protect email addresses with image and audio captchas
    SpamFreeze allows users to post a URL online instead of their email address

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.