diff --git a/wise-webapp/src/main/java/com/wisemapping/exceptions/InvalidEmailException.java b/wise-webapp/src/main/java/com/wisemapping/exceptions/InvalidEmailException.java
new file mode 100755
index 00000000..92739682
--- /dev/null
+++ b/wise-webapp/src/main/java/com/wisemapping/exceptions/InvalidEmailException.java
@@ -0,0 +1,39 @@
+/*
+ *    Copyright [2022] [wisemapping]
+ *
+ *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
+ *   It is basically the Apache License, Version 2.0 (the "License") plus the
+ *   "powered by wisemapping" text requirement on every single page;
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the license at
+ *
+ *       http://www.wisemapping.org/license
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package com.wisemapping.exceptions;
+
+
+import org.springframework.lang.Nullable;
+
+import javax.validation.constraints.NotNull;
+
+public class InvalidEmailException
+        extends ClientException {
+    private static final String EMAIL_IS_INVALID = "INVALID_EMAIL_ADDRESS";
+
+    public InvalidEmailException(@NotNull String emails) {
+        super("Invalid email exception:" + emails, Severity.WARNING);
+    }
+
+    @NotNull
+    @Override
+    protected String getMsgBundleKey() {
+        return EMAIL_IS_INVALID;
+    }
+}
diff --git a/wise-webapp/src/main/java/com/wisemapping/model/User.java b/wise-webapp/src/main/java/com/wisemapping/model/User.java
index 78e4e8ab..663c6a00 100644
--- a/wise-webapp/src/main/java/com/wisemapping/model/User.java
+++ b/wise-webapp/src/main/java/com/wisemapping/model/User.java
@@ -168,7 +168,6 @@ public class User
         return "User{" +
                 "firstname='" + firstname + '\'' +
                 ", lastname='" + lastname + '\'' +
-                ", password='" + password + '\'' +
                 "', email = '" + this.getEmail() + "}";
     }
 }
diff --git a/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java b/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
index 9697fa5d..93e7ab20 100644
--- a/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
+++ b/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
@@ -244,7 +244,7 @@ public class MindmapController extends BaseController {
 
     @RequestMapping(method = RequestMethod.POST, value = "/maps/{id}/collabs/", consumes = {"application/json", "application/xml"}, produces = {"application/json", "application/xml"})
     @ResponseStatus(value = HttpStatus.NO_CONTENT)
-    public void updateCollabs(@PathVariable int id, @NotNull @RequestBody RestCollaborationList restCollabs) throws CollaborationException, MapCouldNotFoundException, AccessDeniedSecurityException {
+    public void updateCollabs(@PathVariable int id, @NotNull @RequestBody RestCollaborationList restCollabs) throws CollaborationException, MapCouldNotFoundException, AccessDeniedSecurityException, InvalidEmailException {
         final Mindmap mindMap = findMindmapById(id);
 
         // Only owner can change collaborators...
@@ -260,7 +260,7 @@ public class MindmapController extends BaseController {
 
             // Is a valid email address ?
             if (!EmailValidator.getInstance().isValid(email)) {
-                throw new IllegalArgumentException(email + " is not valid email address");
+                throw new InvalidEmailException(email);
             }
 
             final Collaboration collaboration = mindMap.findCollaboration(email);
@@ -270,7 +270,7 @@ public class MindmapController extends BaseController {
                 throw new IllegalArgumentException(roleStr + " is not a valid role");
             }
 
-            // Remove from the list of pendings to remove ...
+            // Remove from the list of pending to remove ...
             if (collaboration != null) {
                 collabsToRemove.remove(collaboration);
             }
@@ -408,7 +408,7 @@ public class MindmapController extends BaseController {
         // Is a valid email address ?
         final EmailValidator emailValidator = EmailValidator.getInstance();
         if (!emailValidator.isValid(email)) {
-            throw new IllegalArgumentException(email + " is not valid email address");
+            throw new InvalidEmailException(email);
         }
 
         final Mindmap mindmap = findMindmapById(id);
diff --git a/wise-webapp/src/main/resources/messages_en.properties b/wise-webapp/src/main/resources/messages_en.properties
index a6a9fafc..163f0a66 100644
--- a/wise-webapp/src/main/resources/messages_en.properties
+++ b/wise-webapp/src/main/resources/messages_en.properties
@@ -4,6 +4,7 @@ SITE.TITLE = WiseMapping
 FIELD_REQUIRED = Required field cannot be left blank
 EMAIL_ALREADY_EXIST = There is an account already with this email.
 NO_VALID_EMAIL_ADDRESS = Invalid email address
+INVALID_EMAIL_ADDRESS = Invalid email address. Please, verify that  your entered valid email address.
 PASSWORD_MISMATCH = Your password entries did not match
 CREATOR = Creator
 WELCOME = Welcome