For the Location field, you must select the correct account to create it under (not On My Mac), then set the name to 'Sent'. If you do not see such a mailbox, you will need to create it by choosing the Mailbox menu, then selecting New Mailbox. Be sure that it is a folder underneath the header indicating your server-side email account and NOT 'On My Mac' (that is a local folder).
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
