4.7 Actions

mu4e-headers-action (a) lets you pick custom actions to perform on the message at point. You can specify these actions using the variable mu4e-headers-actions. See Actions for the details.

mu4e defines some default actions. One of those is for capturing a message: a c ‘captures’ the current message. Next, when you’re editing some message, you can include the previously captured message as an attachment, using mu4e-compose-attach-captured-message. See mu4e-actions.el in the mu4e source distribution for more example actions.