bvsatyaram/ValidateEmail — pull request #3 by ambled (2014-09-09 00:26:55+00:00)
Title: Update regex and tests to support common RFC permitted addresses, filter...

... invalid domain formats

1. Allow leading/trailing digits ([0-9]), hypen (-) and underscore (_) in local_part
2. Reject domain containing sequential periods (.)
3. Reject domain name containing underscore (_)