Hey @GermaineNocturnal, this problem has been addressed. Since the release of v4.4.0 all email comparison will be done in case insensitive manner.
To change the behavior to make the comparison case sensitive, simply set PASSBOLT_SECURITY_USERNAME_CASE_SENSITIVE
environment variable to true
(or set passbolt.security.username.caseSensitive
config to true
in passbolt.php file).
Thanks again for bringing this up.