The Addon also adds your previous users to your mailing list, which makes it, even more, easier to keep track of all your old and new users.
- Single/Double user opt-in with verification.
- Custom opt-in message.
- Settings for each Registration Form.
- Merge fields and Map fields to Mailchimp by form.
- Import users in bulk by form.
- Admin receives an email if the user registering fails to subscribe for any reason.
- Admin can download a CSV with errors for users who weren’t bulk imported.
it is easy to customize and works good. Although it is free, they even offer a good support. A minor down side is that after an update you have to reload your language file, but thats ok.