My sign up form looks like it is working, but no one is being added to the list. Why is that?
If your list has double opt-in enabled, new subscribers will receive an email after opting in that prompts them to confirm their email address. Only after a new subscriber confirms their email address will they be added to your list. If you’re testing out a new form with a fake or invalid test email addresses and you have double opt-in enabled, you will not see these email addresses added to your list.