concrete5/concrete5 — pull request #734 by mlocati (2012-11-02 14:02:58+00:00)
Title: Add option to check MX record for email in Form

The email method of ValidationStringsHelper allows to specify an option
to check the mx record for emails. This pull request improve the Form
block by adding a new define (FORM_EMAIL_CHECKMXRECORD) that, if set to
true, enable the mx-check.