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

Michele Neylon:: michele at
Thu Aug 17 18:47:22 IST 2006

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
Tel. 1850 927 280
Intl. +353 (0) 59  9183072
Direct Dial: +353 (0)59 9183090
Fax. +353 (0) 59  9164239

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