/// <summary>Does a Logon with SSL.</summary>
/// <param name="user">The user.</param>
/// <param name="password">The password.</param>
/// <param name="server">The server.</param>
/// <param name="port">The port.</param>
public void LoginSSL(string user, string password, string server, int port = 993)
{
var sslClient = new SslClient();
sslClient.Connect(server, port);
sslClient.DoClientTLS(server);
stream = sslClient.Stream;
Login(user, password);
}