Eric Johnson <[email protected]>:
> I have often wondered why so few e-mail servers use IPv6. From what I
> have read, gmail is one of the few that can use IPv6, but if you send
> e-mail to gmail using IPv6, the messages are treated as spam. I
> readily admit that I have not tested this myself, yet.
Not true, we do IPv6 and most Gmail users receive messages sent from
our relay just fine. Gmail sucks regardless of whether connections are
made over IPv6 or IPv4, they don't appear to have any sort of
discrimination regarding the protocol used. Gmail considers that
anyone running an independent relay must necessarily be a "bulk
sender" and only has solutions for them. Gmail just like other crappy
email services will only vaguely tell you why your message was
considered spam ("it looks like another message that was considered
undesirable."). Most suggestions made by Gmail are vague and will
easily mislead and make people develop theories.
However, most ISPs poorly deploy IPv6 networks, don't register subnets
properly and don't allow end users to set reverse lookups, that doesn't
help running mail relay over IPv6.
