Replace notmuch with mu4e for email

mu4e's refile moves messages between IMAP folders, enabling
cross-device sync via mbsync. notmuch tags are local-only.

- Switch from notmuch to mu/mu4e packages
- Auto-initialize mu database on first sync
- Configure mu4e with folder shortcuts and refile to Archive
- Add NixOS load-path for mu4e elisp files

home/roles/emacs/doom/config.el

@@ -159,31 +159,48 @@
   (dolist (module '("bbdb" "buffer" "elisp" "emacs" "gnus" "os" "search-and-replace" "url"))
     (gptel-tool-library-load-module module)))
 
-;; Notmuch email configuration
+;; mu4e email configuration
-(after! notmuch
+;; Add NixOS mu4e to load-path (installed via mu.mu4e package)
-  (setq notmuch-search-oldest-first nil
+(when-let ((mu-path (executable-find "mu")))
-        notmuch-show-logo nil
+  (add-to-list 'load-path
-        notmuch-fcc-dirs "proton/Sent"
+               (expand-file-name "../share/emacs/site-lisp/mu4e"
+                                 (file-name-directory mu-path))))
 
-        ;; User identity
+(after! mu4e
-        user-mail-address "john@ogle.fyi"
+  ;; User identity
-        user-full-name "John Ogle"
+  (setq user-mail-address "john@ogle.fyi"
+        user-full-name "John Ogle")
 
-        ;; Sending mail via msmtp
+  ;; Maildir location (no account prefix - single account)
-        message-send-mail-function 'message-send-mail-with-sendmail
+  (setq mu4e-maildir "~/Mail"
+        mu4e-attachment-dir "~/Downloads")
+
+  ;; Folder config (matches ~/Mail/INBOX, ~/Mail/Sent, etc.)
+  (setq mu4e-sent-folder "/Sent"
+        mu4e-drafts-folder "/Drafts"
+        mu4e-trash-folder "/Trash"
+        mu4e-refile-folder "/Archive")
+
+  ;; Shortcuts for common folders
+  (setq mu4e-maildir-shortcuts
+        '((:maildir "/INBOX"   :key ?i)
+          (:maildir "/Archive" :key ?a)
+          (:maildir "/Sent"    :key ?s)
+          (:maildir "/Trash"   :key ?t)))
+
+  ;; Behavior settings
+  (setq mu4e-get-mail-command "mbsync -a"
+        mu4e-update-interval 300  ; 5 minutes (matches systemd timer)
+        mu4e-change-filenames-when-moving t  ; required for mbsync
+        mu4e-headers-date-format "%Y-%m-%d"
+        mu4e-headers-time-format "%H:%M")
+
+  ;; Sending mail via msmtp
+  (setq message-send-mail-function 'message-send-mail-with-sendmail
         sendmail-program (executable-find "msmtp")
         message-sendmail-envelope-from 'header
         mail-envelope-from 'header
-        mail-specify-envelope-from t
+        mail-specify-envelope-from t))
-
-        ;; Saved searches for quick access
-        notmuch-saved-searches
-        '((:name "inbox"   :query "tag:inbox"                    :key "i")
-          (:name "unread"  :query "tag:unread"                   :key "u")
-          (:name "flagged" :query "tag:flagged"                  :key "f")
-          (:name "sent"    :query "tag:sent"                     :key "t")
-          (:name "drafts"  :query "tag:draft"                    :key "d")
-          (:name "all"     :query "*"                            :key "a"))))
 
 ;; Whenever you reconfigure a package, make sure to wrap your config in an
 ;; `after!' block, otherwise Doom's defaults may override your settings. E.g.

home/roles/emacs/doom/init.el

@@ -176,8 +176,8 @@
        ;;zig               ; C, but simpler
 
        :email
-       ;;(mu4e +org +gmail)
+       (mu4e +org)
-       notmuch
+       ;;notmuch
        ;;(wanderlust +gmail)
 
        :app

home/roles/email/default.nix

@@ -7,14 +7,15 @@ let
 in
 {
   options.home.roles.email = {
-    enable = mkEnableOption "Enable email with notmuch, mbsync, and msmtp";
+    enable = mkEnableOption "Enable email with mu4e, mbsync, and msmtp";
   };
 
   config = mkIf cfg.enable {
     home.packages = with pkgs; [
       isync      # provides mbsync for IMAP sync
       msmtp      # for SMTP sending
-      notmuch    # email indexing and search
+      mu         # email indexer for mu4e
+      mu.mu4e    # mu4e elisp files for Emacs
       openssl    # for certificate management
     ];
 
@@ -52,58 +53,6 @@ in
       SyncState *
     '';
 
-    # Notmuch configuration
-    home.file.".notmuch-config".text = ''
-      [database]
-      path=${config.home.homeDirectory}/Mail
-
-      [user]
-      name=John Ogle
-      primary_email=john@ogle.fyi
-
-      [new]
-      tags=unread;new;
-      ignore=
-
-      [search]
-      exclude_tags=deleted;spam;
-
-      [maildir]
-      synchronize_flags=true
-    '';
-
-    # Notmuch post-new hook for folder-based tagging
-    home.file."Mail/.notmuch/hooks/post-new" = {
-      executable = true;
-      text = ''
-        #!${pkgs.bash}/bin/bash
-        # Tag messages based on their maildir folder location
-        # This runs after 'notmuch new' indexes new messages
-
-        # Process only messages with the 'new' tag (just indexed)
-        # Add inbox tag only for messages in INBOX folder
-        ${pkgs.notmuch}/bin/notmuch tag +inbox -- tag:new AND folder:INBOX
-
-        # Add sent tag for messages in Sent folder
-        ${pkgs.notmuch}/bin/notmuch tag +sent -inbox -- tag:new AND folder:Sent
-
-        # Add draft tag for messages in Drafts folder
-        ${pkgs.notmuch}/bin/notmuch tag +draft -inbox -- tag:new AND folder:Drafts
-
-        # Add spam tag for messages in Spam folder
-        ${pkgs.notmuch}/bin/notmuch tag +spam -inbox -unread -- tag:new AND folder:Spam
-
-        # Add deleted tag for messages in Trash folder
-        ${pkgs.notmuch}/bin/notmuch tag +deleted -inbox -unread -- tag:new AND folder:Trash
-
-        # Add archive tag for messages in Archive folder
-        ${pkgs.notmuch}/bin/notmuch tag +archive -inbox -- tag:new AND folder:Archive
-
-        # Remove the temporary 'new' tag from all messages
-        ${pkgs.notmuch}/bin/notmuch tag -new -- tag:new
-      '';
-    };
-
     # msmtp configuration
     home.file.".msmtprc".text = ''
       # Default settings
@@ -135,7 +84,7 @@ in
       };
       Service = {
         Type = "oneshot";
-        ExecStart = "${pkgs.bash}/bin/bash -c '${pkgs.isync}/bin/mbsync -a && ${pkgs.notmuch}/bin/notmuch new'";
+        ExecStart = "${pkgs.bash}/bin/bash -c '${pkgs.isync}/bin/mbsync -a && (${pkgs.mu}/bin/mu info >/dev/null 2>&1 || ${pkgs.mu}/bin/mu init --maildir ~/Mail) && ${pkgs.mu}/bin/mu index'";
         Environment = "PATH=${pkgs.rbw}/bin:${pkgs.coreutils}/bin";
         StandardOutput = "journal";
         StandardError = "journal";