diff --git a/client/src/app/infrastructure/utils/validators/email.ts b/client/src/app/infrastructure/utils/validators/email.ts
index d7d51c6fcf..839dee4f2d 100644
--- a/client/src/app/infrastructure/utils/validators/email.ts
+++ b/client/src/app/infrastructure/utils/validators/email.ts
@@ -12,7 +12,7 @@ export function createEmailValidator(): ValidatorFn {
 
         const validEmail = EMAIL_VALIDATION_REGEX.test(value);
         if (!validEmail) {
-            return { email: `Please enter a valid email address` };
+            return { email: `Please enter a valid email address!` };
         }
         return null;
     };
diff --git a/client/src/app/site/modules/user-components/components/user-detail-view/user-detail-view.component.html b/client/src/app/site/modules/user-components/components/user-detail-view/user-detail-view.component.html
index 7357b42d78..c3fcb49965 100644
--- a/client/src/app/site/modules/user-components/components/user-detail-view/user-detail-view.component.html
+++ b/client/src/app/site/modules/user-components/components/user-detail-view/user-detail-view.component.html
@@ -81,7 +81,7 @@ <h2>{{ 'Personal information' | translate }}</h2>
                     formControlName="email"
                 />
                 <mat-error *ngIf="personalInfoForm.get('email')?.hasError('email')">
-                    {{ 'Please enter a valid email address' | translate }}
+                    {{ 'Please enter a valid email address!' | translate }}
                 </mat-error>
             </mat-form-field>
 
diff --git a/client/src/app/site/pages/meetings/pages/participants/pages/participant-detail/pages/participant-detail-manage/components/participant-create-wizard/participant-create-wizard.component.html b/client/src/app/site/pages/meetings/pages/participants/pages/participant-detail/pages/participant-detail-manage/components/participant-create-wizard/participant-create-wizard.component.html
index 626de11595..92f0f16544 100644
--- a/client/src/app/site/pages/meetings/pages/participants/pages/participant-detail/pages/participant-detail-manage/components/participant-create-wizard/participant-create-wizard.component.html
+++ b/client/src/app/site/pages/meetings/pages/participants/pages/participant-detail/pages/participant-detail-manage/components/participant-create-wizard/participant-create-wizard.component.html
@@ -71,7 +71,7 @@ <h2>{{ 'Personal information' | translate }}</h2>
                                 name="email"
                                 formControlName="email"
                             />
-                            <mat-error>{{ 'Please enter a valid email address' | translate }}</mat-error>
+                            <mat-error>{{ 'Please enter a valid email address!' | translate }}</mat-error>
                         </mat-form-field>
                         <!-- username -->
                         <mat-form-field class="full-width">
diff --git a/client/src/app/site/pages/organization/pages/settings/modules/settings-detail/components/organization-settings/organization-settings.component.html b/client/src/app/site/pages/organization/pages/settings/modules/settings-detail/components/organization-settings/organization-settings.component.html
index 027e22f280..c9c60b83cc 100644
--- a/client/src/app/site/pages/organization/pages/settings/modules/settings-detail/components/organization-settings/organization-settings.component.html
+++ b/client/src/app/site/pages/organization/pages/settings/modules/settings-detail/components/organization-settings/organization-settings.component.html
@@ -51,7 +51,7 @@ <h2>{{ 'Email settings' | translate }}</h2>
                 <mat-label>{{ 'Reply address' | translate }}</mat-label>
                 <input matInput formControlName="users_email_replyto" osTrimOnPaste />
                 <mat-error>
-                    {{ 'Please enter a valid email address' | translate }}
+                    {{ 'Please enter a valid email address!' | translate }}
                 </mat-error>
             </mat-form-field>
             <mat-form-field>