The Online Guide to Spam Email!

Here you will find all the information you ever needed regarding spam email.  We have composed a 14 section guide below which you can browse page by page.

If you have any questions please contact our staff.

Quick Links to Our Anti Spam Features!
1. What is spam?	8. Isn't spam illegal?
2. When is spam spam?	9. How big a problem is it?
3. The term comes from?	10. What are DNS blacklists?
4. Why do people send spam?	11. What is an open relay?
5. Where did it come from?	12. How can I stop spam?
6. How did they get my email?	13. How do spam filters work?
7. Does unsubscribing work?	14. Send spam free bulk email?

 

10 of 14 - What are DNS blacklists?

DNS blacklists are lists of domains that are known to originate Spam. Many anti-spam software programs use these lists to control Spam by refusing any email that originates from one of these domains. DNS blacklists are usually maintained by anti-spam organizations or by individuals with an intense dislike for Spam. The difficulty with DNS blacklists is the need for objectivity in deciding when to blacklist a domain. In order to know that a domain is producing Spam, the offence must be reported. Reporting Spam without any anti-abuse mechanism in place, however, leaves nothing to stop people from getting servers added to a DNS blacklist out of malice. The obvious solution would be to require a minimum number of reported incidents before blacklisting a server. This proves equally unsatisfactory however as a measure to stop Spam mail. Anyone who manages large mailing lists knows that a small percentage of people who subscribe subsequently accuse the sender of spamming them when they receive their email. Naturally, a company that sends out millions of legitimate commercial emails will receive more accusations of Spam than one that sends out a smaller amount of spam free bulk email.

The real solution lies in good management. A system administrator that knows about Spam, that knows who the large legitimate bulk mailers are and responds rapidly to complaints from unjustly blacklisted domains will ultimately provide a useful service to the Internet community at large. There are some well-managed DNS blacklists on the Internet and these can be a useful addition to the feature set of anti spam software. Below is a short list of the better known sites:

Realtime Blackhole List
Spam Cop
Spews.org
Open Relay Data Base
Rfc-ignorant.org

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