Send Later is a very simple plugin for macOS Apple Mail with 2 main features

Send Later

It allow to prepare your email and send it later at a defined time and date.
Great for working with people in different time zones and managing the time you spend on emails.

Undo send

It allow you to set a delay before sending an email (ex. 60 seconds) so in case you forgot something, you can still prevent the email to be sent.
Useful to prevent missing email attachment.

Pictures

Logo SVG

Logo PNG