The "ip6
" mechanism (edit)
ip6:<ip6-address>
ip6:<ip6-network>/<prefix-length>
The argument to the "ip6:
" mechanism is an IPv6 network range. If no prefix-length is given, /128 is assumed (singling out an individual host address).
Examples:
"v=spf1 ip6:1080::8:800:200C:417A/96 -all"
Allow any IPv6 address between 1080::8:800:0000:0000 and 1080::8:800:FFFF:FFFF.
"v=spf1 ip6:1080::8:800:68.0.3.1/96 -all"
Allow any IPv6 address between 1080::8:800:0000:0000 and 1080::8:800:FFFF:FFFF.