SMTP over IPv6 : gmail classifying nearly all IPv6 mail as spam since 20140818

Marco d'Itri md at
Fri Aug 22 23:11:19 CEST 2014

On Aug 22, Jared Mauch <jared at> wrote:

> 	Due to the 96-bits/no-magic aspects of many peoples IPv6
> deployments there are many documented cases where the technology
> for synthetic rDNS and other platforms don't exist [yet] or are
> poorly deployed.  I (for example) have no idea what rDNS may
> exist for a DHCPv6-PD received prefix from my ISP would or
This is not really important because hosts on dynamically-assigned IP 
addresses are not supposed to speak SMTP.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 648 bytes
Desc: Digital signature
Url : 

More information about the ipv6-ops mailing list