diff --git a/core/fse.js b/core/fse.js
index e6e7a9d18..b956f9646 100644
--- a/core/fse.js
+++ b/core/fse.js
@@ -167,6 +167,7 @@ exports.FullScreenEditorModule =
                     var newFocusViewId;
                     if (errMsgView) {
                         if (err) {
+                            errMsgView.clearText();
                             errMsgView.setText(err.message);
 
                             if (MciViewIds.header.subject === err.view.getId()) {
diff --git a/core/system_view_validate.js b/core/system_view_validate.js
index 61c52a521..58060aa0f 100644
--- a/core/system_view_validate.js
+++ b/core/system_view_validate.js
@@ -83,19 +83,23 @@ function validateUserNameOrRealNameExists(data, cb) {
 }
 
 function validateGeneralMailAddressedTo(data, cb) {
-    //
-    //  Allow any supported addressing:
-    //  - Local username or real name
-    //  - Supported remote flavors such as FTN, email, ...
-    //
-    //  :TODO: remove hard-coded FTN check here. We need a decent way to register global supported flavors with modules.
-    const addressedToInfo = getAddressedToInfo(data);
+    try {
+        //
+        //  Allow any supported addressing:
+        //  - Local username or real name
+        //  - Supported remote flavors such as FTN, email, ...
+        //
+        //  :TODO: remove hard-coded FTN check here. We need a decent way to register global supported flavors with modules.
+        const addressedToInfo = getAddressedToInfo(data);
+
+        if (Message.AddressFlavor.FTN === addressedToInfo.flavor) {
+            return cb(null);
+        }
 
-    if (Message.AddressFlavor.FTN === addressedToInfo.flavor) {
-        return cb(null);
+        return validateUserNameOrRealNameExists(data, cb);
+    } catch (e) {
+        return cb(new Error('Invalid address'));
     }
-
-    return validateUserNameOrRealNameExists(data, cb);
 }
 
 function validateEmailAvail(data, cb) {