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From: Peter (peterpajamian.dhs.org)
Date: Tue May 07 2013 - 23:11:50 CDT
On 05/08/2013 11:41 AM, Vincent Lefevre wrote:
> Perhaps for IPv4 (but this depends: some people send mail to a few
> restricted people). If only the IPv6 address lacks a PTR, this is
> probably not true, at least in France, where the biggest ISP's don't
> support IPv6, so that there are no deliverability issues with them.
> Only with the few people who have a MX with IPv6 support.
Nope, I can tell your from experience that Comcast will reject your mail
if you relay it from an IPv6 address that doesn't have a PTR.