mail: Add tu-dreden account

Special thanks to whoever thought that a backslash in a user name is a
good idea.

users/simon/modules/mail/accounts.nix

@@ -78,6 +78,33 @@ in
 
         signature.text = signaturePersonal;
 
+        aerc.enable = true;
+      };
+      tu-dresden = rec {
+        realName = "Simon Bruder";
+        address = "simon.bruder@mailbox.tu-dresden.de";
+
+        userName = "user\\sibr833e";
+        passwordCommand = "pass web/tu-dresden.de | head -n 1";
+
+        imap = {
+          host = "msx.tu-dresden.de";
+          tls.useStartTls = true;
+        };
+        smtp = {
+          host = "msx.tu-dresden.de";
+          port = 587;
+          tls.useStartTls = true;
+        };
+
+        gpg = {
+          key = config.programs.gpg.settings.default-key;
+          signByDefault = true;
+          encryptByDefault = true;
+        };
+
+        signature.text = signaturePersonal;
+
         aerc.enable = true;
       };
     };

users/simon/modules/mail/aerc/default.nix

@@ -19,7 +19,12 @@ in
       "aerc/accounts.conf".text = lib.generators.toINI { } (lib.mapAttrs
         # incomplete support for all configuration options!
         (name: accountConfig: with accountConfig; let
-          quoteMailAddress = lib.replaceChars [ "@" ] [ "%40" ];
+          quoteMailAddress = lib.replaceChars [ "@" "\\" ] [ "%40" "%5C" ];
+          # home-manager has no way to set if an account requires AUTH LOGIN
+          # this emulats this by setting a list of known providers that do require it
+          requiresLogin = lib.elem
+            (lib.elemAt (lib.strings.splitString "@" address) 1)
+            [ "mailbox.tu-dresden.de" ];
         in
         {
           source =
@@ -31,7 +36,7 @@ in
           outgoing =
             if notmuch.enable
             then "${./msmtp-wrapper} ${name}"
-            else "`smtp+plain://${quoteMailAddress userName}@${smtp.host}`";
+            else "`smtp${lib.optionalString requiresLogin "+login"}://${quoteMailAddress userName}@${smtp.host}`";
           outgoing-cred-cmd = "`${lib.concatStringsSep " " passwordCommand}`";
           from = "${realName} <${address}>";
           smtp-starttls = if smtp.tls.useStartTls then "yes" else "no";