- Email DIY
What’s Cool About COIL
In terms of opt-in options, you probably think you’ve got them down. But we’re here to introduce you to the overlooked sibling of the family: Confirmed Opt-In Lite. While not yet as famous as the rest, it’s a great way to combine the benefits of rapid list growth of the single opt-in process and the email address validity check of the double opt-in process.