diff --git a/cloudron.js b/cloudron.js
index 39e826f..f53ce31 100644
--- a/cloudron.js
+++ b/cloudron.js
@@ -659,8 +659,8 @@ Cloudron.prototype.checkMail = function (account, callback) {
     });
 
     imap.probe({
-        subject: new RegExp('^Hi from e2e test - ' + this._box.domain + '$'),
-        to: new RegExp((account.to || account.username) + '@' + this._box.domain),
-        body: /This release depends on you/
+        subject: common.regexp('Hi from e2e test - ' + this._box.domain),
+        to: common.regexp((account.to || account.username) + '@' + this._box.domain),
+        body: common.regexp('This release depends on you')
     }, callback);
 };