Sendmail: How does one blacklist annoying spammers?

[Ed Greshko]

On 06/28/2010 12:57 PM, James Matthews wrote:
> Using open source tools is one thing. Google uses a combination of
> open and closed source anti spam tools. Since Gmail is so popular
> google is able to sample spam and learn to protect it from the get go....
Too bad they don't seem to have outbound spam process to catch the
advert in some folks' signatures.

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