Both single opt-in and double opt-in are supported. Single opt-in, a visitor is subscribed immediately, while with double opt-in they must confirm their email by clicking an activation link.

Single opt-in

With single opt-in:

• the subscriber is added right away
• signup is faster
• there is less friction during registration

Double opt-in

With double opt-in:

• the subscriber receives a confirmation email
• they must click the activation link
• the list is usually cleaner and more verified

Choose the best option

Single opt-in may feel easier for users. Double opt-in is often better when you want stronger confirmation and cleaner subscriber data.