Re: [exim] wanna turn off ipv6 when sending to gmail

> Approach 2
> ----------
>
> Keep one router. Have all outbound messages go through that. But use:
>
> ignore_target_hosts = +blacklisted_ipv6_space
>
> Define `domainlist blacklisted_ipv6_space = /etc/mail/ipv6-blacklist` or
> whatever, to reference a list of addresses. Optionally use a fancier
> lookup type, if you're going to have more than a few entries which fit
> in a single page of cache RAM and for which a linear search is faster
> than a fancy search.
>
> Put all of Google's IPv6 space into that file. Track changes and update
> accordingly.
>
> For you, I suspect it'll be simplest to find out which IPv6 blocks are
> originating from Google's AS by querying your router, and put it on a
> periodic maintenance tasklist to refresh it.

so we need a bgp feed of gmail's ipv6 prefixes so we all can automate
blacklisting them?

randy