What is double opt-in?

Double opt-in is a process where, after you subscribe for an email or newsletter, you receive an email asking you to confirm that you really want to join. It’s more like a “Are you sure?” step to make sure you’re not accidentally added or signed up by someone else. You need to click a link or take an action in that confirmation email to complete the sign-up process. This helps prevent spam and ensures that people on the list actually want to be there.