Pre-filling the opt-in form fields

You can also pre-insert name and emails into the opt-in forms using the url tags like so:

wl_email=email&wl_name=name

Check this CaptiFire example :

http://cfdemo.wishloop.com/workshop?wl_email=[e-mail]&wl_name=FULL+Name

The opt-in form on the page will be pre-filled with the values from the parameters "wl_email" and "wl_name".

Here is an example from an EngagiFire Popup that is loaded after 3 seconds : 

http://engagifire.net/timed-popup-appears-in-3-seconds/?wl_email=[e-mail]

So this means you can use links from your emails and use your autoresponders email tags in the links - depending which provider you use they may look something like [[email]], it varies from an autoresponder to another.