If you build your own regular expression to find the email message, and you press OK, there will be nothing in that box. When you press complete and open the email processing action again, the regular expression should be inserted. I always copy my regular expression to a notepad file or somewhere along with the confirmation link. That way, you can copy and paste them either in the action for the regex or the confirmation url in the browser window so that zenno will record going to the url. Then you just need to copy your variable over from the email processing to the Go To Url action.