[naz]

Your email validation code is too strict.

From Wikipedia:

  The local-part of the e-mail address may use any of these ASCII characters:
  Uppercase and lowercase English letters (a–z, A–Z)
  Digits 0 to 9
  Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
  Character . (dot, period, full stop) provided that it is
  not the first or last character, and provided also that 
  it does not appear two or more times consecutively 
  (e.g. [e-mail]).

[joneath]

Thanks, I will update the regex in the next release.

[chrisbroadfoot]

You should use the HTML5 email field:

http://www.whatwg.org/specs/web-apps/current-work/multipage/...