Does case matter when comparing email domain and upn domain for verifying a user?

[jaredsohn]

I don't think it should matter but we've seen a user have a upn domain that is in all caps.

[axfcampos]

Same, dealing with this issue right now.

[mattbnz]

The domain part is not case sensitive. Refer:

• https://datatracker.ietf.org/doc/html/rfc5321#section-2.4 - " Mailbox domains follow normal DNS rules and are
  hence not case sensitive.", which is following from
• https://datatracker.ietf.org/doc/html/rfc1035#section-2.3.3 - "For all parts of the DNS that are part of the official protocol, all
  comparisons between character strings (e.g., labels, domain names, etc.)
  are done in a case-insensitive manner. "

I'm seeing login failures due to case mismatch between user emails and the upn domain ("com" vs "Com").

[pglombardo]

If I'm not mistaken, this was fixed in the new 2.2.0 release: 2.1.0...2.2.0 via #42