diff --git a/interface/web/client/form/client.tform.php b/interface/web/client/form/client.tform.php
index 4faaa6d368144e3baffcd07f7be4b6b367a9fb3a..8d4023908acc83d9f377ba7f4aa92b4a48323ee3 100644
--- a/interface/web/client/form/client.tform.php
+++ b/interface/web/client/form/client.tform.php
@@ -292,6 +292,10 @@ $form["tabs"]['address'] = array (
                                   2 => array( 'event' => 'SAVE',
                                               'type' => 'TOLOWER')
                                 ),
+			'validators'	=> array ( 	0 => array (	'type'	=> 'REGEX',
+														'regex' => '/^(\w+[\w\.\-\+]*\w{0,}@\w+[\w.-]*\.[a-z\-]{2,10}){0,1}$/i',
+														'errmsg'=> 'email_error_isemail'),
+									),
 			'default'	=> '',
 			'value'		=> '',
 			'separator'	=> '',
diff --git a/interface/web/client/lib/lang/de_client.lng b/interface/web/client/lib/lang/de_client.lng
index d9b5f8362083ad2f5dcb219c1357aa19aa79165f..23d0b79fb50dbc8d3ea8c5e2fc8b3c1904ce87e3 100644
--- a/interface/web/client/lib/lang/de_client.lng
+++ b/interface/web/client/lib/lang/de_client.lng
@@ -135,4 +135,5 @@ $wb['generate_password_txt'] = 'Passwort erzeugen';
 $wb['repeat_password_txt'] = 'Passwort wiederholen';
 $wb['password_mismatch_txt'] = 'Die Passwörter stimmen nicht überein.';
 $wb['password_match_txt'] = 'Die Passwörter stimmen überein.';
+$wb['email_error_isemail'] = 'Bitte geben Sie eine gültige E-Mail Adresse ein.';
 ?>
diff --git a/interface/web/client/lib/lang/de_reseller.lng b/interface/web/client/lib/lang/de_reseller.lng
index 01fe16d370f314871502af576dd2d923f9d4d4ae..76b0dffcac5052b4c07975bea50482666ded456b 100644
--- a/interface/web/client/lib/lang/de_reseller.lng
+++ b/interface/web/client/lib/lang/de_reseller.lng
@@ -128,4 +128,5 @@ $wb['generate_password_txt'] = 'Passwort erzeugen';
 $wb['repeat_password_txt'] = 'Passwort wiederholen';
 $wb['password_mismatch_txt'] = 'Die Passwörter stimmen nicht überein.';
 $wb['password_match_txt'] = 'Die Passwörter stimmen überein.';
+$wb['email_error_isemail'] = 'Bitte geben Sie eine gültige E-Mail Adresse ein.';
 ?>
diff --git a/interface/web/client/lib/lang/en_client.lng b/interface/web/client/lib/lang/en_client.lng
index b8712908f5643f5d412a07b9c92d3d997f517f70..38946a48c06276ad505fcca1567d78ef666ea680 100644
--- a/interface/web/client/lib/lang/en_client.lng
+++ b/interface/web/client/lib/lang/en_client.lng
@@ -138,4 +138,5 @@ $wb['generate_password_txt'] = 'Generate Password';
 $wb['repeat_password_txt'] = 'Repeat Password';
 $wb['password_mismatch_txt'] = 'The passwords do not match.';
 $wb['password_match_txt'] = 'The passwords do match.';
+$wb['email_error_isemail'] = 'Please enter a valid email address.';
 ?>
diff --git a/interface/web/client/lib/lang/en_reseller.lng b/interface/web/client/lib/lang/en_reseller.lng
index 367340d3f52fe5905f67bb16829998c70264eaae..bc26515501e779888aa9dbd88366f0c782326cbc 100644
--- a/interface/web/client/lib/lang/en_reseller.lng
+++ b/interface/web/client/lib/lang/en_reseller.lng
@@ -130,4 +130,5 @@ $wb['generate_password_txt'] = 'Generate Password';
 $wb['repeat_password_txt'] = 'Repeat Password';
 $wb['password_mismatch_txt'] = 'The passwords do not match.';
 $wb['password_match_txt'] = 'The passwords do match.';
+$wb['email_error_isemail'] = 'Please enter a valid email address.';
 ?>