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1.2 Other mail clients

Under the hood, mu4e is fully search-based, similar to programs like notmuch4 and sup5.

However, mu4e’s user-interface is quite different. mu4e’s mail handling (deleting, moving, etc.) is inspired by Wanderlust6 (another Emacs-based e-mail client), mutt7 and the dired file-manager for emacs.

mu4e keeps all the ‘state’ in your maildirs, so you can easily switch between clients, synchronize over IMAP, backup with rsync and so on. The Xapian-database that mu maintains is merely a cache; if you delete it, you won’t lose any information.