The MBX Reach blog opens with a guide on opt-in

Short, practical articles on email marketing, written for the people who run a list rather than for specialists. The first one settles the question every signup form has to answer: single or double opt-in.

• What each option does, and what the extra confirmation click costs you in signups.
• The cases where double opt-in is worth it, and the ones where it is not.

Read the guide →