ipv6 on postfix

Works, although it does feel a little incoherent setup wise it [] sometimes required and not required, and having access to reverse dns means i can mail google in ipv6, your experience might be different (not here) than the zoo’s

Don’t forget about spf records

Being ipv6 is very mostly silicon valley based (not amazon) i was surprised that some try and abuse ipv6 and the domain name system

Domain unknown senders
frostystoo.default.scharles.uk0.bigv.io[2001:41c8:51:770:fcff:ff:fe00:435c]:<secrppl*3*@appslconfg.com>:

Although we do see them trying this from ipv4 too

No damage was done and the ipv6 and ipv4 protocol matched the fake domain.

Ipv6 accounts for 25% of dns traffic and not many ipv6 mx entries so 1% of email traffic unless you email gmail all the time.