https://connect.mozilla.org/t5/discussions/literal-ipv6-hostname-validation-fails/m-p/117493#M46356 <P>I can't create a new account when providing an email in the literal IPv6 format (see attachment):</P><P>username@[IPv6:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]</P><P>When I create the same DNS-less address using IPv4, it works.</P><P>It seems like a bug.</P><P>146.0.1 (64-bit)</P> Fri, 06 Feb 2026 08:39:38 GMT oooo-ps 2026-02-06T08:39:38Z https://connect.mozilla.org/t5/discussions/literal-ipv6-hostname-validation-fails/m-p/117493#M46356 <P>I can't create a new account when providing an email in the literal IPv6 format (see attachment):</P><P>username@[IPv6:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx]</P><P>When I create the same DNS-less address using IPv4, it works.</P><P>It seems like a bug.</P><P>146.0.1 (64-bit)</P> Fri, 06 Feb 2026 08:39:38 GMT https://connect.mozilla.org/t5/discussions/literal-ipv6-hostname-validation-fails/m-p/117493#M46356 oooo-ps 2026-02-06T08:39:38Z