Sendmail: How does one blacklist annoying spammers?

JD jd1008 at
Fri Jun 25 23:56:20 UTC 2010

On 06/25/2010 03:04 PM, Tom Horsley was caught red-handed while writing::
> On Fri, 25 Jun 2010 14:54:27 -0700
> JD wrote:
>> I wonder how Google does it. only .01% of my google email is spam.
>> The spam folder contains tons of spam, and it is automatically purged
>> by google.
> Yea, I just use gmail as my mail provider and download the
> mail with fetchmail. I think one non-spam item wound up
> in my gmail spam folder in several months.
So, does anyone know how google filters spam?
I mean is it proprietary or do they use open source tools?

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