On 4 Feb 2004 at 20:42, Edgar Lovecraft wrote about
"Re: [Exim] Require A records for ho":
|...
| And almost all of those that use only host
| and not host.domain should be rejected
Almost? What should be the discriminating factor?
| as they are not valid email servers.
Not as I read the RFCs. Cite?
| And Greg is not the only one that requires host information
| to valid in many different ways. --
True, I'm sure. Which is not the same as saying it's a good idea.
FWIW, when I experimented with much less strict consistency checking
here (IP->PTR->sameIP), I got about 25% false positives. I have a
hard time picturing any company that could afford to use such checks
to reject mail.
- Fred
