Email authentication (1.18.1) appears to have a flaw in the validation check. If an email address has a period in it, it will fail to parse correctly and say that it is an invalid email address (e.g. firstname.lastname@example.org fails, while email@example.com passes). As a result, many of my colleagues cannot make accounts if I require email authentication. Has anyone figured out where the validation takes place in order to fix it?