[Gllug] SPAM - trying to block at SMTP level

[Rich Walker]

Rev Simon Rumble <simon at rumble.net> writes:

> This one time, at band camp, Bruce Richardson wrote:
>
>> In your scenario, I would actually recommend greylisting.  Greylisting
>> gives a temporary knockback to sender/recipient/ip-address tuples that
>> it hasn't seen before/recently.  Kosher mail systems will retry,
>> spammers do not bother.  The big win for you is that this happens at the
>> smtp conversation stage *before* the message itself is transmitted.
>
> Greylisting rocks!  I find it knocks back 80-90% of spam before it even 
> gets sent.  Though I'd prefer you didn't implement it because once 
> enough people do it, the spammers will adapt 8)

We tried it for about 3 days. I had so many complaints about real email
from real people not getting to us, that it got removed. Seems the
number of f'd up mail servers is much greater than we think.

cheers, Rich.

-- 
rich walker         |  Shadow Robot Company | rw at shadow.org.uk
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