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e-mail spoofing
Last modified: Wednesday, September 15, 2004 

Forging an e-mail header to make it appear as if it came from somewhere or someone other than the actual source. The main protocol that is used when sending e-mail -- SMTP -- does not include a way to authenticate. There is an SMTP service extension (RFC 2554) that allows an SMTP client to negotiate a security level with a mail server. But if this precaution is not taken anyone with the know-how can connect to the server and use it to send spoofed messages by altering the header information.

In some jurisdictions, e-mail spoofing anyone other than yourself is illegal.

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For internet.com pages about e-mail spoofing . Also check out the following links!

Related Links

How To Protect From Spoofed/Forged Email
A general overview of email spoofing and the problems that can result from it.

RFC 2554: SMTP Service Extension for Authentication
The full text of RFC 2554 from the IETF.

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related categories

Computer Law

Electronic Mail

Ethics

Security

related terms

e-mail

header

IP spoofing

phishing

SMTP

social engineering

SPF

spoof


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