On: Email sucks. Time saving tips from Kevin Rose

[someone_here]

In some email systems like postfix, you can change what the + character is (like . or _ or even numbers) So you could have username_football@example.com

[chmike → someone_here]

Underscore is not a valid character in user names. Use - instead.

[mike-cardwell → chmike]

You're confusing "usernames" and "email addresses". Underscores are fine in the local part of an email address. The following are also valid:

O'Reilly@example.com

"Foo@Bar"@example.com

[chmike → mike-cardwell]

Indeed. Sorry about this. I was confusing local part with domain name. Here is a blog note providing a detailed information on this.

http://haacked.com/archive/2007/08/21/i-knew-how-to-validate...