ohmailchimp

How does it work:

After having installed ohmailchimp and enabled it, you just have to insert your mailchimp API Key in the setting view. From now on, whenever you create or edit an event, you will be able to connect them to a different mailing list previously created in your mailchimp account.
When people register to your event, they will be automatically added to that list, populating it out of the box and allowing you to manage communication, before, during and after your event in a more powerful and easy way.

Ohmailchimp also work with the new event frontend submission system

Mailchimp for ohanah is distributed for free when purchasing ohanah.