diff --git a/nixos/modules/phoebus/alarm-server.nix b/nixos/modules/phoebus/alarm-server.nix
index 7eb4c23d..9319af53 100644
--- a/nixos/modules/phoebus/alarm-server.nix
+++ b/nixos/modules/phoebus/alarm-server.nix
@@ -101,6 +101,56 @@ in {
             default = ["Accelerator"];
             apply = lib.concatStringsSep ",";
           };
+
+          # Email options:
+          # ---
+
+          "org.phoebus.email/mailhost" = lib.mkOption {
+            description = ''
+              The SMTP server host.
+
+              If set to DISABLE (the default), email support is disabled.
+            '';
+            type = lib.types.str;
+            default = "DISABLE";
+          };
+
+          "org.phoebus.email/mailport" = lib.mkOption {
+            description = ''
+              The SMTP server port.
+            '';
+            type = lib.types.port;
+            default = 25;
+            apply = toString;
+          };
+
+          "org.phoebus.email/username" = lib.mkOption {
+            description = ''
+              Username for authenticating to the SMTP server.
+            '';
+            type = lib.types.str;
+            default = "";
+          };
+
+          "org.phoebus.email/password" = lib.mkOption {
+            description = ''
+              Password for authenticating to the SMTP server.
+
+              Note: the password will be put in plaintext, in the world-readable `/nix/store`.
+            '';
+            type = lib.types.str;
+            default = "";
+          };
+
+          "org.phoebus.email/from" = lib.mkOption {
+            description = ''
+              Default address to be used for the email field `From:`.
+
+              If left empty, then the last used from address is used.
+            '';
+            type = lib.types.str;
+            default = "";
+          };
         };
       };
     };