To enforce a double opt-in process for your contacts, you can create a Flow.
To do that follow the instructions below.
1. Create your confirmation email
Create a new email like this one and include the confirmation email link in it:
For the confirmation link, you need a custom landing page like yourwebsite.com/subscription-confirmed thanking subscribers for confirming the opt-in.
Alternatively, you can use a UTM/ref link that leads to your homepage for instance yourwebsite.com/?ref=subscription-confirmed
It's critical that you include a unique confirmation link and not a link to your homepage.
2. Create the confirmation Flow
Create the following Flow:
This Flow will automatically send the Confirmation email to all people that enter your Encharge account.
3. Create a segment of opted-in people
The last step is to create a segment of people that have clicked on the confirmation link.
Use the "Email Activity" condition and segment all people that have clicked on the confirmation link:
This will create a segment of people that have opted in to receive emails from you.
Finally, ensure that you're only sending Flows and Broadcasts to this segment of people.