The next step is to tell mu4e where it can find your Maildir, and
some special folders.
So, for example4:
;; these are actually the defaults (setq mu4e-sent-folder "/sent" ;; folder for sent messages mu4e-drafts-folder "/drafts" ;; unfinished messages mu4e-trash-folder "/trash" ;; trashed messages mu4e-refile-folder "/archive") ;; saved messages
The folder (maildir) names are all relative to the root-maildir (see the
output of mu info). If you use mu4e-context, see
Contexts and special folders for what that means for these special
folders.
Note that the folders (mu4e-sent-folder,
mu4e-drafts-folder, mu4e-trash-folder and
mu4e-refile-folder) can also be functions that are evaluated
at runtime. This allows for dynamically changing them depending on the
situation. See Dynamic folders for details.