[SLL] [SLL} Re: Anti-spam methods

[Jules Agee]

Glenn Stone wrote:
>> Works OK if your mail is not time critical, and if none of it comes from
>> people operating clueless MTAs that don't understand retry.   I believe
>> there may still be some of those.
> 
> Postgrey, which is what I use, comes preseeded with what they hope to be a
> comprehensive list of them as are still braindead, which include Yahoo
> Groups, Southwest Airlines, Ameritrade, Debian (!!), and Amazon (by way of
> trying to embarass them into fixing things).  So, yeah, there are such
> things, but they're actually reasonably well-known, and one would presume
> that updates to the package would include whitelist updates as well.
> 
> Oh, and Mitch, if you happen to be listening?  mxlogic.net doesn't retry
> either.  (Of course, presumably you'd have your upstream filter providers
> whitelisted already in the .local file...)

I use postgrey too... some of the senders you listed do understand
retry, they just don't always retry from the same IP address, so
postgrey doesn't recognize it as a retry. Still, as you mentioned, the
number of problematic systems are few and the manual whitelist requires
very little maintenance after the first month or two.

-Jules