CAMBRIDGE, Mass. - The war on spam is far from over, but there was a growing sense among the anti-spam crusaders gathered at MIT last week that advances on both the legal and technology fronts have turned the tide against the Viagra peddlers and Nigerian princesses.

Nobody was claiming that spam will ever be completely eliminated, or even that the amount of spam is decreasing. In fact, anti-spam newsletter writer John Graham-Cumming reported that he conducted an online survey in which spam accounted for 77% of e-mail messages received by the nearly 5,000 respondents.

But the crowd of more than 100 members of the spam fighting fraternity was buoyed by several of the day’s presentations.

On the legal front, Jon Praed, founding partner of the Internet Law Group, drew cheers when he reported that convicted North Carolina spammer Jeremy Jaynes was sentenced in November to nine years in a Virginia jail. Jaynes - No. 8 on Spamhaus’s Register of Known Spam Operations, or Rokso, list - was charged with sending millions of pieces of spam via a program called RoboMail to America Online customers in 2003. AOL is based in Virginia.

Jaynes is the first person ever convicted in the U.S. on felony spam charges, which were based on a tough Virginia law in which penalties increase based on the number of fraudulent messages sent. Virginia Attorney General Jerry Kilgore is not letting up, either - last May he arrested a woman in Fort Worth, Texas, and brought her to Virginia to face spam charges. That trial hasn’t started yet.

“I can guarantee that spammers today are scared to death that they’re next,” Praed said. He added that tough laws are only part of the equation. “The solution is a marriage of technology and law.”

On the tech side, amid presentations on Bayesian noise reduction, lexicographical distancing, and classifier aggregation, there was a general sense that spam filters had gotten about as good as they’re going to get, which is pretty darn good.

“In general, we’re doing a good job keeping spam out of people’s inbox,” said Andrew Klein, product manager for spam filter company MailFrontier. With success rates currently in the 97% to 98% range, Klein said, “I don’t know if we can get much better.”  He said that no product will ever eradicate all spam, but today’s products can reduce spam to “an acceptable level.”