regex expressions for validating email addresses

Whilst doing my usual mindless surfing of the internet, I found this page webmonkey relating to the validation of email addresses. In short, this is what they had to say: 1. Dirt-simple approach Here’s a regex that only requires a very basic xxxx@yyyy.zzz: .+\@.+\..+ Upside: Dirt simple. Downside: Even invalid email addresses like xxxx@yyyy.zzz, or …