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mu4easy

GNU Emacs MELPA

A global minor mode that defines a full working setup for mu4e and mbsync, based on mu 1.12+. Easily setup accounts and aliases from these providers: Google, Apple, GMX, Outlook, and Proton. Additional packages are installed and configured for a better experience, including mu4e-column-faces, mu4e-alert, and org-msg. Some customizations are available, run (customize-group 'mu4easy).

Install locally and use the load-path variable, e.g.:

(use-package mu4easy
  :load-path "~/Code/mu4easy"
  :bind ("C-c u" . mu4e)
  :config (mu4easy-mode))

Or install with Melpa. Here is an example with one email account:

(use-package mu4easy
  :ensure t
  :bind ("C-c u" . mu4e)
  :config (mu4easy-mode)
  :custom
  (mu4easy-contexts '((mu4easy-context
                       :c-name  "Google"
                       :maildir "Gmail"
                       :mail    "a@gmail.com"
                       :smtp    "smtp.gmail.com"
                       :sent-action delete))))

See later more details on the mu4easy-context macro.

Make sure you have mu in your in PATH.

Comments and suggestions are welcome.

mbsync

The important part is to normalize all accounts to have the same structure, containing the folders Inbox, Archive, Sent, Trash, Drafts and Spam. I would advice against syncing the Drafts folder because it can lead to issues. If you decide not to sync it, just remove the relevant lines from the .mbsyncrc file. We assume isync 1.5.0 or newer.

Let’s go over each provider and examine the gotchas.

Google

IMAPAccount Gmail
Host imap.gmail.com
User a@gmail.com
PassCmd "gpg -q --for-your-eyes-only --no-tty -d ~/.authinfo.gpg | awk '/machine imap.gmail.com login a@gmail.com/ {print $NF}'"
AuthMechs LOGIN
TLSType IMAPS
TLSVersions +1.2
CertificateFile /usr/local/etc/openssl@1.1/cert.pem

MaildirStore Gmail-local
Path ~/Mail/Gmail/
Inbox ~/Mail/Gmail/Inbox
SubFolders Verbatim

IMAPStore Gmail-remote
Account Gmail

Channel Gmail-inbox
Far :Gmail-remote:"INBOX"
Near :Gmail-local:"INBOX"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Gmail-trash
Far :Gmail-remote:"[Gmail]/Trash"
Near :Gmail-local:"Trash"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Gmail-spam
Far :Gmail-remote:"[Gmail]/Spam"
Near :Gmail-local:"Spam"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Gmail-all
Far :Gmail-remote:"[Gmail]/All Mail"
Near :Gmail-local:"Archive"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Gmail-drafts
Far :Gmail-remote:"[Gmail]/Drafts"
Near :Gmail-local:"Drafts"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Group Gmail
Channel Gmail-inbox
Channel Gmail-trash
Channel Gmail-all
Channel Gmail-spam
Channel Gmail-drafts

First is the PassCmd. I assume all passwords (and application specific passwords) are in ~/.authinfo.gpg with the password key-value pair last (see the NF variable in awk pointing to the last column).

Next, Google has the structure [Gmail]/... so we use explicit far/near definitions. We’ll drop them in the next providers.

Finally, unlike other providers, we’re not going to sync the Sent folders because Google is saving all email in the All Mails folders and you’ll end up with duplicates locally.

Apple

IMAPAccount Apple
Host imap.mail.me.com
PORT 993
User a@icloud.com
PassCmd "gpg -q --for-your-eyes-only --no-tty -d ~/.authinfo.gpg | awk '/machine imap.mail.me.com/ {print $NF}'"
AuthMechs LOGIN
TLSType IMAPS
TLSVersions +1.2
CertificateFile /usr/local/etc/openssl@1.1/cert.pem

MaildirStore Apple-local
Path ~/Mail/Apple/
Inbox ~/Mail/Apple/Inbox
SubFolders Verbatim

IMAPStore Apple-remote
Account Apple

Channel Apple-all
Far :Apple-remote:
Near :Apple-local:
Patterns "INBOX" "Archive" "Trash" "Spam" "Drafts"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Apple-sent
Far :Apple-remote:"Sent Messages"
Near :Apple-local:"Sent"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Group Apple
Channel Apple-sent
Channel Apple-all

Here we use the Patterns key to quickly select the folders we’re interested in. It turns the Sent folders has many conventions; at Apple it’s called Sent Messages.

GMX

IMAPAccount GMX
Host imap.gmx.com
User a@gmx.com
PassCmd "gpg -q --for-your-eyes-only --no-tty -d ~/.authinfo.gpg | awk '/machine imap.gmx.com login a@gmx.com/ {print $NF}'"
AuthMechs LOGIN
TLSType IMAPS
TLSVersions +1.2
CertificateFile /usr/local/etc/openssl@1.1/cert.pem

MaildirStore GMX-local
Path ~/Mail/GMX/
Inbox ~/Mail/GMX/Inbox
SubFolders Verbatim

IMAPStore GMX-remote
Account GMX

Channel GMX
Far :GMX-remote:
Near :GMX-local:
Patterns "INBOX" "Archive" "Trash" "Spam" "Drafts" "Sent"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Outlook

IMAPAccount Outlook
Host outlook.office365.com
User a@outlook.com
PassCmd "gpg -q --for-your-eyes-only --no-tty -d ~/.authinfo.gpg | awk '/machine outlook.office365.com login a@outlook.com/ {print $NF}'"
AuthMechs LOGIN
TLSType IMAPS
TLSVersions +1.2

MaildirStore Outlook-local
Path ~/Mail/Outlook/
Inbox ~/Mail/Outlook/Inbox
SubFolders Verbatim

IMAPStore Outlook-remote
Account Outlook

Channel Outlook-all
Far :Outlook-remote:
Near :Outlook-local:
Patterns "INBOX" "Archive" "Sent"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Outlook-junk
Far :Outlook-remote:"Junk"
Near :Outlook-local:"Spam"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Channel Outlook-trash
Far :Outlook-remote:"Deleted"
Near :Outlook-local:"Trash"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

Group Outlook
Channel Outlook-all
Channel Outlook-junk
Channel Outlook-trash

Proton

IMAPAccount Proton
Host 127.0.0.1
PORT 1111
User a@protonmail.com
PassCmd "gpg -q --for-your-eyes-only --no-tty -d ~/.authinfo.gpg | awk '/machine 127.0.0.1/ {print $NF}'"
AuthMechs LOGIN
TLSType STARTTLS
TLSVersions +1.2
CertificateFile /usr/local/etc/openssl@1.1/cert.pem

MaildirStore Proton-local
Path ~/Mail/Proton/
Inbox ~/Mail/Proton/Inbox
SubFolders Verbatim

IMAPStore Proton-remote
Account Proton

Channel Proton
Far :Proton-remote:
Near :Proton-local:
Patterns "INBOX" "Archive" "Trash" "Spam" "Drafts" "Sent"
CopyArrivalDate yes
Create Both
Expunge Both
SyncState *

In order to us Proton, one needs to install a bridge application. It specifies the IMAP and SMTP ports to use (non-standard).

mu4e

Let’s go over the important parts of the elisp code.

(setf (alist-get 'refile mu4e-marks)
      '(:char ("r" . "")
              :prompt "refile"
              :dyn-target (lambda (target msg) (mu4e-get-refile-folder msg))
              ;; Notice the special treatment for Gmail.
              :action (lambda (docid msg target)
                        (let ((maildir (mu4e-message-field msg :maildir)))
                          (if (string-match-p "Gmail\\|Google" maildir)
                              (mu4e--server-remove docid)
                            (mu4e--server-move docid (mu4e--mark-check-target target) "+S-u-N"))))))

Gmail requires special treatment for archiving and deletion, since folders are labels and everything exist in the All Mail, in addition to other “locations” like Inbox, Sent, etc. Here, we deal with Gmail by regex matching with the maildir name; adapt if needed. In this example, archiving for Gmail means removing the email (from the Inbox) while for other providers it means moving the email. Similar notion for deletion.

(cl-defmacro mu4easy-context (&key c-name maildir mail smtp
                                   (smtp-mail mail)
                                   (smtp-port 587)
                                   (smtp-type 'starttls)
                                   (sent-action 'sent)
                                   (name "Daniel Fleischer")
                                   (sig "Daniel Fleischer"))
  (let
      ((inbox      (concat "/" maildir "/Inbox"))
       (sent       (concat "/" maildir "/Sent"))
       (trash      (concat "/" maildir "/Trash"))
       (refile     (concat "/" maildir "/Archive"))
       (draft      (concat "/" maildir "/Drafts")))

    `(make-mu4e-context
      :name ,c-name
      :match-func (lambda (msg)
                    (when msg
                      (string-match-p (concat "^/" ,maildir "/")
                                      (mu4e-message-field msg :maildir))))
      :vars '((user-mail-address . ,mail)
              (user-full-name . ,name)
              (mu4e-sent-folder . ,sent)
              (mu4e-drafts-folder . ,draft)
              (mu4e-trash-folder . ,trash)
              (mu4e-refile-folder . ,refile)
              (mu4e-sent-messages-behavior . ,sent-action)
              (smtpmail-stream-type . ,smtp-type)
              (smtpmail-smtp-service . ,smtp-port)
              (smtpmail-smtp-user . ,smtp-mail)
              (smtpmail-smtp-server . ,smtp)
              (smtpmail-debug-info . t)
              (smtpmail-debug-verbose . t)
              (org-msg-signature . ,sig)
              (mu4e-maildir-shortcuts .
                                      ((,inbox   . ?i)
                                       (,sent    . ?s)
                                       (,trash   . ?t)
                                       (,refile  . ?a)
                                       (,draft   . ?d)))))))

That’s the macro to create contexts or identities. It’s assuming you have a consistent maildirs structure, like specified in the mbsync config, i.e. all account names are on a single level and then below them you have Inbox, Archive, Trash, Sent, Spam and Drafts for each one. To match the context I’m just looking at the maildir the message is in. Some defaults in the function are the SMTP encryption and what to do with sent messages (either delete them in the case of Google or save them in the Sent folder; more on that in the contexts examples).

Next there are some variables settings; these are set to taste, feel free to experiment with them. Next are the bookmarks, which are very convenient both for jumping and for reading the read/unread counts.

Tip: the bookmarks query can be either a function or a string. If it’s a function, there is no read/unread count. I’m using a string generated from a function; if you first eval the string and then set the variable, you do get counts.

For org-msg package users, notice that the package itself handles the signature, so you want to define org-msg-signature like I did in the macro. It accepts org formatting, e.g. *Daniel Fleischer*\n/Skynet Inc/ and then converts it into formatted HTML. Also, when using org-msg, reply style is top-posting so you need it to handle the signature correctly (above the replied text).

Another improvement is creating a customized link description; i.e. calling org-store-link to save a link to an email, it uses mu4easy-mail-link-description which will give a nice description of the form to/from: subject (ISO timestamp) - works with org-capture as well.

Added is a custom updating function that asks you which account to update, or by default updates all. It is bound to the usual “U”.

Finally, setting up the accounts, either using customization or using code:

(setq mu4easy-contexts

      '((mu4easy-context
         :c-name  "Google"
         :maildir "Gmail"
         :mail    "a@gmail.com"
         :smtp    "smtp.gmail.com"
         :sent-action delete)

        (mu4easy-context
         :c-name  "1-GMX"
         :maildir "GMX"
         :mail    "a@gmx.com"
         :smtp    "mail.gmx.com")

        (mu4easy-context
         :c-name    "2-GMX-alias"
         :maildir   "GMX"
         :mail      "a.alias@gmx.com"
         :smtp      "mail.gmx.com"
         :smtp-mail "a@gmx.com")

        (mu4easy-context
         :c-name  "Apple"
         :maildir "Apple"
         :mail    "a@icloud.com"
         :smtp    "smtp.mail.me.com")

        (mu4easy-context
         :c-name  "3-Apple-alias"
         :maildir "Apple"
         :mail    "a@me.com"
         :smtp    "smtp.mail.me.com"
         :smtp-mail "a@icloud.com")

        (mu4easy-context
         :c-name  "Outlook"
         :maildir "Outlook"
         :mail    "a@outlook.com"
         :smtp    "smtp-mail.outlook.com")

        (mu4easy-context
         :c-name    "Proton"
         :maildir   "Proton"
         :mail      "a@protonmail.com"
         :smtp      "127.0.0.1"
         :smtp-type ssl
         :smtp-port 999)

        (mu4easy-context
         :c-name    "4-Proton-alias"
         :maildir   "Proton"
         :mail      "a@pm.com"
         :smtp      "127.0.0.1"
         :smtp-mail "a@protonmail.com"
         :smtp-type ssl
         :smtp-port 999)))

Important points:

  1. Jumping to contexts is based on their first (unique) letter, that’s why I’m using numbers in the c-name key.
  2. Google saves the sent messages in the All Mail (Archive) folder so it is recommended to set the corresponding mu4e setting to delete sent messages (locally). It’s only for Google; for the other account, sent messages are saved in the Sent folder.
  3. The 2-GMX account is an alias - not another GMX account (see the last comment). It has a different mail, but the SMTP authentication needs the real email address. The outgoing email still looks like it is coming from the alias.
  4. Proton account needs SSL encryption for SMTP, it connects to localhost and uses non-standard ports for IMAP and SMTP (check the Proton bridge app for details).
  5. If you have multiple accounts with the same providers, they should have different maildirs, e.g. ~/Mail/Gmail1/, ~/Mail/Gmail2/. Here I showed aliases, not multiple accounts.

Disclaimer

This setup is based upon a couple of weeks worth of tweaking, trial and error. It’s not perfect; some email were lost (those not saved into sent), lessons were learned. I didn’t try it with Microsoft-based emails. Make sure to test everything you do - to see that emails are going in and out, saved in Archive and Sent, compare the results with the web-based interface until you get comfortable using it 100% of the time. Or not.