Re: SMTP Port Blocking: Success or Failure?

[John Levine <johnl () iecc com>]

> What about rate limiting SMTP traffic rather than blocking it? That
> could allow legitimate use for most private customers, while
> preventing bulk traffic.

Comcast has been doing something like that, looking for spikes of SMTP
connects and blocking when they see them, done at the IP level.  I
can't say that I'm overly impressed with how well it's working, but
it's better than nothing.

Regards,
John Levine, johnl () iecc com, Primary Perpetrator of "The Internet for Dummies",
Information Superhighwayman wanna-be, http://www.johnlevine.com, Mayor
"I dropped the toothpaste", said Tom, crestfallenly.