Ease of use and reliability. I'd reco this to everyone.

The integration in apple mail, all the possibilities, to avoid sending mail, the template and the follow of reading and link. If you work with email often, you have to use this app, it's so useful !

MailButler was so easy to use. I had to submit an entry into a job lottery hosted every year at the same time: midnight on June 1. Selection is based on order received, a precedence of priority based on the time the email is submitted. For the last three years, I have been staying up all night on that day (May 31) to send the email at midnight. MailButler is an app that makes it possible to schedule your email delivery several hours, days, weeks, months in advance. It worked!