Milter-greylist

Michael Mansour wrote:
> Hi,
> 
> Quite a few times I get greylist delays from senders that use their ISP's mail
> servers and thus come out looking as a sender from:
> 
> Received: from termserv.example.ad (xxx-xxx-xx-xx.static.example.com.au
> [xxx.xxx.xx.xx])
> 
> and such a message (although valid) is delayed by 16hrs.
> 
> I only added the words "example" above and "xxx", the rest is as is so the .ad
> and the .com.au don't match).
> 
> How would people recommend I deal with these?

   Why would you want to whitelist a generic rDNS like that?  My own server logs
contain plenty of entries from infected PC's sitting behind entries like that and
a real business would have gone to the trouble of making the ISP change that
generic entry to something that reflected their company domain name.