Redirect after opt in

How do I redirect whoever opts in to another page like in www.doubleyourdating.com ? Basically I am going to make a squeeze page where they must enter their name and email to get into my sales page.

[DW]

What you need to do is this:

1. Browse to the "List Settings" -> "Custom HTML" page.
2. Click "New" to create a new Custom HTML set.
3. Edit the "Signup Success" page - you can either enter your HTML directly or enter a URL under "Alternately, enter a URL to forward the user to."
4. Name and save the Custom HTML set
5. Go back to the List Settings page for your list, select the name of the new set under "Custom HTML" and save the list settings.

Regards