Mike keeps having problems where online forms won't accept his email address, saying it's not a valid email. It doesn't matter what browser or computer he uses. What gives? Leo says to make sure you're using a US region keyboard in the regional settings. It may have been changed unwittingly. It also could be an issue with your keyboard driver. Gmail also acknowledges dots and dashes in an email, while some websites do not. So if you have email@example.com, Gmail will accept that, but a form may not.