^(/|http://|https://)
Start with / or http
^(http|https):\/\/((?!domain.com).)*$
This is for redirecting to EXTERNAL websites ONLY!!! Do not use this to redirect to pages or files within your own site. This field must start with http(s):// and NOT contain domain.com
^[\s\S]{0,200}$
MAX = 200 characters
^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}$