I created myusername@hotmail.com in 1999, then immediately lost the password. I couldn't recover my account or use the same name again, so I created myusername_

I created myusername@hotmail.com in 1999, then immediately lost the password. I couldn't recover my account or use the same name again, so I created myusername_@hotmail.com. In the twenty-two years that have followed, the only website that has had a problem with my email address is Chapters Indigo, which explicitly rejects it as invalid. For email validation, keeping it simple is best.