public void SmtpClientHasCorrectProperties()
        {
            const string host     = "myhost";
            const string user     = "******";
            const string password = "******";

            var smtpClient = EmailManager.CreateSmtpClient(host, user, password);

            Assert.AreEqual(host, smtpClient.Host);
            Assert.IsInstanceOfType(smtpClient.Credentials, typeof(System.Net.NetworkCredential));
            Assert.AreEqual(user, (smtpClient.Credentials as System.Net.NetworkCredential).UserName);
            Assert.AreEqual(password, (smtpClient.Credentials as System.Net.NetworkCredential).Password);
            Assert.AreEqual(EmailManager.Port, smtpClient.Port);
            Assert.AreEqual(SmtpDeliveryMethod.Network, smtpClient.DeliveryMethod);
        }