diff --git a/src/views/email.html b/src/views/email.html
index 8c5dc0ece..dadc5e503 100644
--- a/src/views/email.html
+++ b/src/views/email.html
@@ -159,7 +159,7 @@
               </input>
             </label>
             <div style="padding: 0 10px;">
-              <slider id="storageQuota" ng-disabled="!mailboxes.edit.storageQuotaEnabled" ng-model="mailboxes.edit.storageQuota" step="1000000000" tooltip="hide" ticks="storageQuotaTicks"></slider>
+              <slider id="storageQuota" ng-disabled="!mailboxes.edit.storageQuotaEnabled" ng-model="mailboxes.edit.storageQuota" step="500000000" ticks-snap-bounds="1000000000" tooltip="hide" ticks="storageQuotaTicks"></slider>
             </div>
           </div>
 
diff --git a/src/views/email.js b/src/views/email.js
index 5c17f02c0..47f72cbbe 100644
--- a/src/views/email.js
+++ b/src/views/email.js
@@ -42,7 +42,7 @@ angular.module('Application').controller('EmailController', ['$scope', '$locatio
     $scope.domain = null;
     $scope.adminDomain = null;
     $scope.diskUsage = {};
-    $scope.storageQuotaTicks = [ 1*1000*1000*1000, 15*1000*1000*1000, 50*1000*1000*1000, 100*1000*1000*1000 ];
+    $scope.storageQuotaTicks = [ 500*1000*1000, 1*1000*1000*1000, 15*1000*1000*1000, 50*1000*1000*1000, 100*1000*1000*1000 ];
 
     $scope.expectedDnsRecords = {
         mx: { },