Definition: E-mail spoofing is the act of falsifying header information in an e-mail so that seems to come from other than its true origin. The protocol for e-mail, SMTP (Simple Mail Transfer) used has no authentication to verify the source. By changing the header information someone can send you an email seems of that they want to come. Unbelievers can even copy the logo and format of the organization concerned, to enter the e-mail an authentic look and feel.
E-mail is used by spoofing virus writers. The spread of a virus with a forged email source, it is difficult for the user to continue to receive the virus source to stop the virus.
E-mail spoofing is also used by distributors, spam, to hide their identity. In March 2009, the daily newsletter from About.com was the victim of a high volume of spam e-mail trying to sell fake Viagra. Since logo and address of About.com, some recipients the message contained truly believed responsible for About.com.
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