public void TestSMTPLogonFailure() { _settings.AutoBanOnLogonFailure = true; _settings.MaxInvalidLogonAttempts = 2; _settings.MaxInvalidLogonAttemptsWithin = 5; _settings.AutoBanMinutes = 3; Account account = SingletonProvider <TestSetup> .Instance.AddAccount(_domain, "*****@*****.**", "test"); var sim = new SmtpClientSimulator(); //[email protected] / test string errorMessage; sim.ConnectAndLogon("dGVzdEB0ZXN0LmNvbQ==", "dGVzdA==", out errorMessage); sim.Disconnect(); // confirm that we can retrieve welcome message. Assert.IsTrue(sim.GetWelcomeMessage().StartsWith("220")); // fail to log on 3 times. for (int i = 0; i < 2; i++) { CustomAsserts.Throws <System.Exception>(() => sim.ConnectAndLogon("dGVzdEB0ZXN0LmNvbQ==", "Vaffe==", out errorMessage)); sim.Disconnect(); if (i == 2) { Assert.IsTrue(errorMessage.Contains("Too many invalid logon attempts.")); } } Assert.IsTrue(sim.GetWelcomeMessage().Length == 0); string logText = LogHandler.ReadCurrentDefaultLog(); Assert.IsTrue(logText.Contains("Blocked either by IP range or by connection limit."), logText); }