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Reverse DNS. The reverse DNS is a service that returns a name assigned to an I.P. address.
An I.P. address can be used by many domain names. The rDNS name is the true name, the rest are aliases, or "knick-names"
Apparently there is a requirement that a mail server identify itself with it's rDNS assigned name when it attempts to deliver e-mail.
The receiving mail server can verify this name against the I.P. address to see if can trust the sending mail server. It is estimated by some internet posters that 80 percent of the incoming spam has bad rDNS data.
Unfortunately there are still too many real mail servers with misconfigured rDNS for many mail servers to use this easy method of sorting out spam |
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Additional comments :
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Additional Sources for Glossary Information
The SpamCop Glossary is being limited to terms used within the SpamCop Forums. The following additional links provide far more information which may both help to better explain terms defined in the SpamCop Glossary as well as many more terms not included here. They are listed in no particular order.
NetLingo - The Internet Dictionary
NetLingo contains thousands of definitions that easily explain the Internet and the online world of business, technology, and communication.
Updated weekly with new terms, NetLingo is (currently) ranked #656 in Google's Top 1000 Web sites and reviewed in many publications.
Our mission is to educate and entertain you, and keep you up-to-date.
The Jargon File
The Jargon File is a comprehensive compendium of hacker slang illuminating many aspects of hackish tradition, folklore, and humor.
Wiktionary
Wiktionary is a sister project to
Wikipedia intended to be a free wiki dictionary (including thesaurus and lexicon) in every language.
Wiktionary serves to:
- explain the meanings of words, terms and abbreviations
- translate words from one language to another
- act as a thesaurus by showing synonyms
Contributors:
WB8TYW (aka John)
Wazoo
turetzsr (aka Steve T)
StevenUnderwood (aka Steven P. Underwood, DNRC)
qjvgpuryy (aka David)
Miss Betsy
Lking
Larry Kilgallen (ng member)
Jeff G.
Jank1887
dbiel