Under 'Sent Mailbox' use the drop down to select the folder called 'Sent'.Select the 'Mailbox Behaviours' tab on the right.
Here's how to change the default sent mailbox using Apple Mail on macOS 10.12 Sierra:
This conflicts with many other applications which use the folder 'Sent' instead. If the option to 'Store sent messages on the server' is active it will create a folder called 'Sent Messages' on the server and use that folder to save copies of sent messages. It's important to understand the 'rules' for how this must work before making any configuration changes.Īpple Mail defaults to a sent mailbox/folder named 'Sent Messages'. Please take a read over this general article on the topic of configuring Sent folders on all of your mail apps and devices. Changing Apple Mail's default Sent Messages folder to the Sent folder
