Manual talk:$wgEmailAuthentication

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. tom.dunkle@gmail.com fails, while tomdunkle@gmail.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?

I checked through the "UserMailer.php" file and did not see anything that would fix this problem.