FIND:

 NOTE --- This is a partial match, the whole line on a fresh installation looks like this:
			if (preg_match('#^(([a-z0-9&.-_+])|(\*))+@[a-z0-9\-]+\.([a-z0-9\-]+\.)*?[a-z]+$#is', trim($email_list_temp[$i])))

'#^(([a-z0-9&.-_+])|(\*))+@[a-z0-9\-]+\.([a-z0-9\-]+\.)*?[a-z]+$#is'

IN-LINE FIND:

'#^(([a-z0-9&.-_+])|(\*))+@[a-z0-9\-]+\.([a-z0-9\-]+\.)*?[a-z]+$#is'

IN-LINE REPLACE WITH:

'/^(([a-z0-9&\'\.\-_\+])|(\*))+@(([a-z0-9\-])|(\*))+\.([a-z0-9\-]+\.)*?[a-z]+$/is'