Milter-greylist

> Hi, all -
> 
> With so many organizations using mail services like Google and Microsoft
> and Amazon and the like, I am seeing more and more messages being
> delayed by greylisting for *every* e-mail.
> 
> I had a mail conversation with someone today. They use some Amazon
> hosted mail service. The first email came from [sender1] and was relayed
> through ec2-54-153-11-11.us-west-1.compute.amazonaws.com. The second
> mail came from [sender1] but from
> ec2-54-153-22-22.us-west-1.compute.amazonaws.com, and so on. Every
> new
> e-mail wound up coming through a different relay on Amazon.
> 
> What winds up happening is, EVERY new e-mail is delayed, often times
> several hours because they don't retry in a timely fashion.
> 
> I'm definitely not a milter-greylist expert. Is there something I'm
> missing? This is becoming more and more of a hassle every day.
> 
> Thanks!
> Thomas
> 

I am using this configuration before greylisting:

racl whitelist spf pass

The big providers with multi-host sending scheme normally 
has correct SPF records too.