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C.3 Reading messages

  1. How can I view attached images in my message view buffers? See Viewing images inline.
  2. How can I word-wrap long lines in when viewing a message? You can toggle between wrapped and non-wrapped states using w. If you want to do this automatically, invoke visual-line-mode in your mu4e-view-mode-hook.
  3. How can I perform custom actions on messages and attachments? See Actions.
  4. Does mu4e support crypto (i.e., decrypting messages and verifying signatures)? Yes – if mu was built with GMime 2.6 or later, it is possible to do both (note, only PGP/MIME is supported). In the Main view the support is indicated by a big letter C on the right hand side of the mu4e version. See Decryption and Verifying signatures. For encryption and signing messages, see Writing messages.
  5. How can I prevent mu4e from automatically marking messages as ’read’ when i read them? Set mu4e-view-auto-mark-as-read to nil.
  6. Does mu4e support including all related messages in a thread, like Gmail does? Yes – see Including related messages.
  7. There seem to be a lot of duplicate messages – how can I get rid of them? See Skipping duplicates.
  8. How can I use the eww browser to view rich-text messages? With a new enough emacs, this happens automatically. See Html2text functions for some details.
  9. Some messages are almost unreadable in emacs - can I view them in an external web browser? Indeed, airlines often send messages that heavily depend on html and are hard to digest inside emacs. Fortunately, there’s an action (Message view actions) defined for this. Simply add to your configuration:
    (add-to-list 'mu4e-view-actions
      '("ViewInBrowser" . mu4e-action-view-in-browser) t)
    

    Now, when viewing such a difficult message, type aV, and the message opens inside a webbrowser. You can influence the browser with browse-url-generic-program; and see Privacy aspects.

  10. How can read encrypted messages that I sent?. Since you do not own the recipient’s key you typically cannot read those mails - so the trick is to encrypt outgoing mails with your key, too. This can be automated by adding the following snippet to your configuration (courtesy of user kpachnis):
    (require 'epg-config)
    (setq mml2015-use 'epg
          epg-user-id "gpg_key_id"
          mml2015-encrypt-to-self t
          mml2015-sign-with-sender t)
    
  11. view-as-pdf seems to hang for some e-mails - what can I do about that? Short answer: install nspluginwrapper. Longer answer: mu comes with msg2pdf, which is a program used to convert the messages to pdf, and which depends on WebKit, which in some cases needs nspluginwrapper and it waits for a long time if it’s not there. So, installing nspluginwrapper prevents that.
  12. Can I ’bounce’ or ’resend’ messages? Yes - it is possible to edit a (copy of) an existing message and then send it, using M-x mu4e-compose-resend. This gives you a raw copy of the message, including all headers, encoded parts and so on. Reason for this is that for resending, it is important not to change anything (except perhaps for the ’To:’ address when bouncing); since we cannot losslessly decode an existing message, you get the raw version.

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