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

Joseph Brennan brennan at columbia.edu
Tue May 15 09:59:55 EDT 2007



--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



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