is gmail strongly penalizing IPv6 senders?

[Marco d'Itri]

On May 30, Olivier MJ Crepin-Leblond <ocl at gih.com> wrote:

> Gmail uses a number of things like SPF etc. to define if something's
> Spam.
At this time, technologies like SPF and DKIM are not easily applicable 
by default in the hosting market.

> Did you check that this designates the IPv6 address as a permitted
> sender? Do your SMTP servers have reverse IPv6 addresses? Do you use
> DKIM? Just a few suggestions...
For the time being let's just assume that I am not a moron. :-)

-- 
ciao,
Marco