My Opt-ins aren't being added to my autoresponder

There are a whole host of reasons for signups not appearing in the AR (autoresponder). Assuming the AR is connected up ok and that there is no error messages appearing in the Leadgen settings page., then some of the reasons for the signups not appearing could be:
- The emails domain is banned by the AR, hotmail.com, yahoo.com are commonly blocked by AR
- The email has been on a list before. If an email has previously been on an AR list and un subscribed, the AR will never add it back on.

- The AR list is set to double opt in and the email has not been confirmed yet. An email wont appear until the recipient has click the confirm link in the AR