Unhandled Exception: RabbitMQ.Client.Exceptions.BrokerUnreachableException: None of the specified endpoints were reachable ---> System.AggregateException: One or more errors occurred. (Authentication failed, see inner exception.) ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception. ---> Interop+OpenSsl+SslException: SSL Handshake failed with OpenSSL error - SSL_ERROR_SSL. ---> Interop+Crypto+OpenSslCryptographicException: error:14090087:SSL routines:ssl3_get_server_certificate:cert length mismatch
    On the server SSL2 and SSL3 has been disabled. We are trying to us TLS1.2 which is enabled on the server.

public void Connection(bool useTLS){

            ConnectionFactory factory = new ConnectionFactory();
            factory.Port = 5671;
            factory.UserName = "user";
            factory.Password = "password";
            factory.VirtualHost = "";
            factory.HostName = "develop.example.com";


            factory.Ssl.Enabled = true;
            factory.Ssl.Version = System.Security.Authentication.SslProtocols.Tls12;
        factory.Ssl.CertificateValidationCallback = (sender, ConsumerTagConvention, chain, SslPolicyErrors) => { return true; };
            factory.Ssl.AcceptablePolicyErrors |= System.Net.Security.SslPolicyErrors.RemoteCertificateChainErrors |
                System.Net.Security.SslPolicyErrors.RemoteCertificateNameMismatch |
                System.Net.Security.SslPolicyErrors.RemoteCertificateNotAvailable;

            IConnection conn = factory.CreateConnection();

            if (conn.IsOpen)
            {
                Console.WriteLine("Connected");
                conn.Close();
            }
            else
                Console.WriteLine("Failed");

    }