Today I Learned is an open-source project by Hashrocket that exists to catalogue the sharing & accumulation of knowledge as it happens day-to-day. Posts have a 200-word limit, and posting is open to any Rocketeer as well as selected friends of Hashrocket. We hope you enjoy learning along with us.
- /hashrockettil
- /hashrocket/tilex

according to this guy, http://davidcel.is/blog/2012/09/06/stop-validating-email-addresses-with-regex/

this is a valid email address: "Look at all these spaces!"@example.com