I wrote last week about how I decided a while back to see if I could build my own opt-in email autoresponder system as a WordPress plugin. The first part that I chose to figure out was the double opt-in component, which I will describe here.
Before I get into that, I want to point out some potential limitations of building an email autoresponder into a WordPress plugin. I don’t think the actual opt-in process will be that significant because it is only handling traffic that is already on the website. It just involves sending an extra email message and and an extra page load as the visitor completes the double opt-in.