A fix for a conflict between WP-EMail and Event Espresso. Once the attendee entered their personal information on the registration page, WP-Email would re-direct the user to a share post form, this removes the action for registration pages. Add this to a site specific plugin or your themes functions.php file.

ee_wp_mail_fix.php

<?php //Please do not include the opening php tag if one is already open.

function ee_wp_mail_fix()
{
	global $this_is_a_reg_page;
	if($this_is_a_reg_page) {
	remove_action('template_redirect', 'wp_email', 5);
	}
}
add_action( 'template_redirect', 'ee_wp_mail_fix', 4 );