Re: Greylisting (Was Re: [Hampshire] Spam increase?)

On Thu, April 26, 2007 6:55 am, Tony Whitmore wrote:
> Tom Dawes-Gamble wrote:
>> On Wed, April 25, 2007 8:08 pm, Andy Smith wrote:
>>> What it does mean is that whenever people say things like "I'm using
>>> $TECHNIQUE and I get almost no spam now!" it doesn't mean that they
>>> are not making some sort of trade-off, which may be significant or
>>> unworkable in the specific case.
>>>
>>
>> No, but then saying "has some quite serious downsides." is no better.
>> IMHO.
>>
>> When I read that I wondered if I'd missed something in my evaluation of
>> greylisting.
>
> Well, the downsides discussed here are serious enough that I probably
> couldn't use greylisting at work. We have lots of mail from Yahoo,
> Hotmail, Gmail account etc. and a day or two's delay in delivering mail
> would be unacceptable to our users.
>

A good commercial choice. IMHO the Yahoo Hotmail Gmail stuff is not that
serious. As I said earlier I use postgrey and it comes pre configured
with 70 odd domains like Yahoo hotmail Gmail that are whitelisted. I don't
know about other greylisting tools. I know I read someplace that you can
run the greylist in a "Listen only" mode for a while so that it learns
your regular sender recipient combinations soome it can be implemented
with major disruption to users.

Regards,
Tom.

--
There are 10 sorts of people in the world.
Those that understand binary and those that don't.