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

Michael Baird mike at
Thu Aug 17 15:23:48 IST 2006

On Thu, 2006-08-17 at 09:11 -0400, Billy A. Pumphrey wrote:
> Does anyone only accept email that will do a reverse lookup?  Does
> anyone recommend it?

I use it on all my inbound MX's, it's pretty standard, you won't see any
problems using it, all the bigger ISP's implemented it some time ago,
and brought the smaller guys into line.

I've been testing this milter
as well, on a lower pref MX (Spam Catcher). It goes further then just
checking reverse DNS, it also checks whether the domain actually accepts
mail, and if it accepts mail for the specified sender.

Michael Baird

More information about the MailScanner mailing list