diff --git a/emailadmin/inc/class.emailadmin_wizard.inc.php b/emailadmin/inc/class.emailadmin_wizard.inc.php
index 1460885ea1..0ef4d4b6f5 100644
--- a/emailadmin/inc/class.emailadmin_wizard.inc.php
+++ b/emailadmin/inc/class.emailadmin_wizard.inc.php
@@ -1221,6 +1221,14 @@ class emailadmin_wizard
 		$readonlys['tabs']['emailadmin.account.aliases'] = !$content['acc_smtp_type'] ||
 			$content['acc_smtp_type'] == 'emailadmin_smtp';
 
+		// allow smtp class to disable certain features in alias tab
+		if ($content['acc_smtp_type'] && class_exists($content['acc_smtp_type']) &&
+			is_a($content['acc_smtp_type'], 'emailadmin_smtp_ldap', true))
+		{
+			$content['no_forward_available'] = !constant($content['acc_smtp_type'].'::FORWARD_ATTR');
+			$readonlys['deliveryMode'] = !constant($content['acc_smtp_type'].'::FORWARD_ONLY_ATTR');
+		}
+
 		// allow imap classes to disable certain tabs or fields
 		if (($class = emailadmin_account::getIcClass($content['acc_imap_type'])) && class_exists($class) &&
 			($imap_ro = call_user_func(array($class, 'getUIreadonlys'))))
diff --git a/emailadmin/templates/default/account.xet b/emailadmin/templates/default/account.xet
index 3ba1ab5ac7..ffe300a2c7 100644
--- a/emailadmin/templates/default/account.xet
+++ b/emailadmin/templates/default/account.xet
@@ -255,7 +255,7 @@
 					<taglist id="mailAlternateAddress" autocomplete_url=""/>
 					<description/>
 				</row>
-				<row>
+				<row disabled="@no_forward_available">
 					<description for="mailForwardingAddress" value="Forward email's to"/>
 					<taglist id="mailForwardingAddress" autocomplete_url=""/>
 					<checkbox label="Forward only" id="deliveryMode" selected_value="forwardOnly" onchange="if (widget.getValue()) et2_dialog.alert('Forward only disables IMAP mailbox / storing of mails and just forwards them to given address.','Forward only');"/>