Reverse Dns Question...is it really necessary or not?

[Jonathan de Boyne Pollard]

SF> AOL refuses incoming email for servers that have no rDNS, 
SF> so it's not exactly oddball mailadmins doing it. 

Many would point to that as evidence that it was *exactly* oddball mail 
admins doing it.  AOL has a *long* history of adopting ill-conceived and 
half-baked measures in this field.

<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/smtp-anti-ubm-dont-work.html#SourceRouting>