Could Be OT: How many people only accept reverse DNS lookup mail?

[Michele Neylon:: Blacknight.ie]

Jim Holland wrote:
  However I would expect that many (most?) of the major systems
> that have problems with greylisting (eg Yahoo, Gmail etc) would be RDNS
> compliant.
> 

Our solution to that was to whitelist the netblocks that gmail use ..
their main issue wasn't that they didn't "comply" with greylisting, but
do some kind of load-balancing on the outbound mail, so the same mail
could "try" from several IPs... and never graduate to a whitelist


-- 
Mr Michele Neylon
Blacknight Solutions
Quality Business Hosting & Colocation
http://www.blacknight.ie/
Tel. 1850 927 280
Intl. +353 (0) 59  9183072
Direct Dial: +353 (0)59 9183090
Fax. +353 (0) 59  9164239