Hi, I have a mailchimp account and am using the CMC Mailchimp for Joomla component which adds a tickbox to the Joomla registration form, and if ticked with auto subscribe the user to the mailchimp mailing list. Also there is an option/tickbox for the user to subscribe/unsubscribe within Edit Profile.
https://compojoom.com/joomla-extensions/cmc-mailchimp-for-joomla
Unfortunetly its not working, but ive tested a CMC module that works independently of the registration and this works fine, therefore currently it seems the issue is easyprofile, you can see the ticket below:
https://compojoom.com/forum/cmc-mailchimp-for-joomla/21527-user-not-subscribed-subscribe-failed-error
Im currently waiting for a response from the developers of the CMC component, but wanted to make you aware of the situation and ask if there is anything that you can think of that might be causing issues or that might help them.
Ive posted a link to the registration form in the 'Site Details' tab, so you can see exactly what i mean.
Many many thanks in advance!