How to enable Double Opt-in within MailerLite
We recommend that Double Opt-in in enabled on your newsletter system. This means that when someone subscribes to your mailing list they will receive an email with a link/button asking them to confirm their email...
Add a newsletter subscription form and connect it to MailChimp
Here is a short video demonstrating how to setup a newsletter form and connect it to MailChimp.
Overview of MailPoet Email Newsletter