Connecting your inbox is totally optional. It’s only required to enable specific additional features such as response detection.
Once connected, FollowUpThen only accesses the data it need to perform the action you are telling it to do. For example, response detection only requires that we view the header of the email (so we can determine if it’s is a reply) and does not access the subject or content of any message in your inbox.
Emails that are sent directly to FollowUpThen are, of course, stored in an encrypted format so we can send a followup at a later time.