Reject IPv6 domain literals with a zone index - #177
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ipaddress.IPv6Address accepts '%scope' since Python 3.9, but RFC 5321's IPv6-addr has no zone index, so 'me@[IPv6:fe80::1%eth0]' was accepted.
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Since Python 3.9,
ipaddress.IPv6Addressaccepts a zone index, so withallow_domain_literal=Trueme@[IPv6:fe80::1%eth0]validates. So doesme@[IPv6:::1%]], whose normalized address keeps the extra]. RFC 5321's IPv6-addr has no zone index, so this rejects addresses whosescope_idis set.The test also checks that
[IPv6:::ffff:1.2.3.4]is still accepted.Written with AI assistance (Claude); I have reviewed the change.