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12.1 Extension points ¶

There are a number of places where mu4e lets you plug in your own functions:

• Custom functions for message header — see Custom headers
• Using message-specific folders for drafts, trash, sent messages and refiling, based on a function — see Dynamic folders
• Using an attachment-specific download-directory — see the variable mu4e-attachment-dir.
• Apply a function to a message in the headers view - see Headers view actions
• Apply a function to a message in the message view — see Message view actions
• Add a new kind of mark for use in the headers view - see Adding a new kind of mark
• Apply a function to a MIME-part — see MIME-part actions
• Custom function to mark certain messages — see Custom mark functions
• Using various mode-hooks, mu4e-compose-pre-hook (see Compose hooks), mu4e-index-updated-hook (see FAQ — Frequently Asked Questions)

You can also write your own functions without using the above. If you want to do so, key useful functions are mu4e-message-at-point (see below), mu4e-headers-for-each (to iterate over all headers, see its docstring) and mu4e-view-for-each-part (to iterate over all parts/attachments, see its docstring). There is also mu4e-view-for-each-uri to iterate of all the URIs in the current message.

Another useful function is mu4e-headers-find-if which searches for a message matching a certain pattern; again, see its docstring.