I'm against all of the complex regex as well, having learned through trial and error that it is usually way more trouble than it's worth. That being said, there

I'm against all of the complex regex as well, having learned through trial and error that it is usually way more trouble than it's worth. That being said, there are many cases where the email address being verified is not the user's email, but maybe someone they are doing business with, and they don't want the system sending a verification email to every email address they are saving with your software.