[Mimedefang] DNS Lookups in MD - Was RBL and DNS lookups

[Joseph Brennan]

--On Tuesday, May 15, 2007 9:45 -0400 Jeff Rife <mimedefang at nabs.net> wrote:

>> This test is based on AOL's reverse pointer rules.  AOL uses this test
>> to  outright block email.  We use it ONLY to score email.


No they don't.  AOL says they "may" block mail without PTR.

Joseph Brennan
Lead Email Systems Engineer
Columbia University Information Technology