diff --git a/app/controllers/register.js b/app/controllers/register.js
index 22d51440f8a..eda3f79e5e6 100644
--- a/app/controllers/register.js
+++ b/app/controllers/register.js
@@ -31,6 +31,8 @@ export default class RegisterController extends Controller {
       .catch(reason => {
         if (reason && Object.prototype.hasOwnProperty.call(reason, 'errors') && reason.errors[0].status === 409) {
           this.set('errorMessage', this.l10n.t('User already exists.'));
+        } else if (reason?.errors[0]?.status === '422') {
+          this.set('errorMessage', this.l10n.t('Invalid email address.'));
         } else {
           this.set('errorMessage', this.l10n.t('An unexpected error occurred.'));
         }