diff --git a/src/domains.js b/src/domains.js
index a9065506f..19f179d3f 100644
--- a/src/domains.js
+++ b/src/domains.js
@@ -313,7 +313,7 @@ function del(domain, auditSource, callback) {
     assert.strictEqual(typeof callback, 'function');
 
     if (domain === settings.adminDomain()) return callback(new BoxError(BoxError.CONFLICT, 'Cannot remove admin domain'));
-    if (domain === settings.mailDomain()) return callback(new BoxError(BoxError.CONFLICT, 'Cannot remove mail domain'));
+    if (domain === settings.mailDomain()) return callback(new BoxError(BoxError.CONFLICT, 'Cannot remove mail domain. Change the mail server location first'));
 
     domaindb.del(domain, function (error) {
         if (error) return callback(error);