Email login handling has problem with "." in it

Talkyard doesn't know if the email provider considers example.user@example.com and exampleuser@example.com the same address. I think Gmail does, but others, I don't know.

If Talkyard assumed the addresses are the same, but in fact they're not (the email provider thinks) that'd make it possible to hijack someone else's account.

You can add more email addresses (e.g. the one without a .) if you go to your user profile page (here at Ty .io it's: https://www.talkyard.io/-/users/izgzhen/preferences/account )
and click Add email address. However maybe this won't let you actually log in with that other address — I don't immediately remember.

(Any ideas about how to improve how this works?
Maybe an admin configurable list of email providers that ignore . ?)