Create a simple OSX Apple Mail plugin to delay sending with a specified duration in Preferences.

Job ID: 30953351

Budget: €750 – €1,500 EUR

When the user clicks "Send Message", Apple Mail will wait the specified time before actually sending the message.
In Mail Preferences, you can set the delay with 2 fields: 1 numeric value and 1 drop-down list to select second, minutes or hour. See preferences.jpg
After completing this first step, the goal is to add more feature to the plugin.
You must be a confirmed Apple Xcode developper and ideally know about Apple plugins developpment.
Apple mail doc : https://developer.apple.com/documentation/mailkit
The source code of a plugin which can be very useful : https://gpgtools.org/ sources : https://releases.gpgtools.org/GPG_Suite-2021.1_105_v2.txz
Related categories: Mac OS Apple Xcode