Delivering mail to Comcast?

[John Neiberger]

​I'm finding someone to check into this for you and will let you know what
I find out.

Thanks,
John​


On Tue, Nov 1, 2016 at 7:50 AM, Shane Kerr <shane at time-travellers.org>
wrote:

> I have been running my own e-mail server for many years now, and have
> been native IPv6 for... maybe 5 or 6 years?
>
> I never have any problems, except for delivering to Comcast users. I
> get bounces like this:
>
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
>   xxx at comcast.net
>     SMTP error from remote mail server after initial connection:
>     host mx2.comcast.net [2001:558:fe21:2a::6]: 554
> resimta-ch2-08v.sys.comcast.net comcast ESMTP server not available
>   yyy at comcast.net
>     SMTP error from remote mail server after initial connection:
>     host mx2.comcast.net [2001:558:fe21:2a::6]: 554
> resimta-ch2-08v.sys.comcast.net comcast ESMTP server not available
>
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