Emails are case insensitive, but sometimes people will put capital letter in them (for I guess vanity/presentation reasons). But this means if user@foo.org is whitelisted User@foo.org won't trigger anything

Can we make the check case insensitive easily enough without having to add something to every email line?

Having to make https://gerrit.wikimedia.org/r/#/c/integration/config/+/512544/ is pointless (as is having to make the user "change" their email in their config), when we should either be normalising them to a single case or similar