It would be valuable to have a synchronization between Apple Calendar and Mailbutler.

In addition it would be great if the duration of the task could be entered and the timeslot in the calendar (ical) gets adjusted to this duration. e.g I need to write a longer Email to Thomas. It takes me about 40 min an I will do it on Monday 10:00 o'clock. --> Calendar enter (Write Email to Thomas, 10:00-10:40). Next level would be, if I could ask Mailbutler to search a possible timeslot for me in my calender to fullfill the task.

Hi Dennis! Thank you for sharing this idea with us. We will discuss the feasibility of implementation with the Team.