End of the road for SMTP?

My spin: This is a very technical but informative article about SMPT an email transport protocol. Read it to get a better understanding of email and SPAM!
Cnet News Clip: The protocol that has defined e-mail for more than two decades may have a fatal flaw: It trusts you.
Developed when the Internet was used almost exclusively by academics, the Simple Mail Transfer Protocol, or SMTP, assumes that you are who you say you are.
SMTP makes that assumption because it doesn’t suspect that you’re sending a Trojan horse virus, that you’re making fraudulent pleas for money from the relations of deposed African dictators, or that you’re hijacking somebody else’s computer to send tens of millions of ads for herbal Viagra. (full story)