ipv6 PTR record; was: Re: Fwd: Bounce action notification

R P Herrold herrold at owlriver.com
Thu Jan 2 18:08:25 UTC 2014

On Thu, 2 Jan 2014, Dave Neary wrote:

> I looked up lists.ovirt.org, linode01.ovirt.org and ovirt.org on
> SenderBase, and all have a good reputation... anyone more familiar with
> mail spam handling who can intervene/investigate?

> > "said: 550 Connections from the host Unknown
> >     (2600:3c01::f03c:91ff:fe93:4b0d), originating from SenderBase

As the message says, and I confirm, there is no ipv6 PTR 
record.  Wearing my ISP hat, we do not favor email lacking 
such in our spamassassin rules, and I know that the US ISP 
Comcast also down-rates / refuses email from hosts lacking 

[herrold at centos-6 ~]$ host 2600:3c01::f03c:91ff:fe93:4b0d
	not found: 3(NXDOMAIN)
[herrold at centos-6 ~]$

I would start by getting it set

-- Russ herrold

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