I'm using an INI file instead of putting email address into the HTML form. The email addresses containing underscore characters (_) are displaying an error. I searched this forum and found the posts about adding _ and - to define(EMAIL_NAME) *BUT it still isn't working*.

define("EMAIL_NAME","^[-a-z0-9._-]+"); // the '^' is an important security feature!

HELP! Thank you!
-Cheryl