Connecting to POP3 server using IPv6 fails

[microlite]

If you try and connect to a POP3 server using IPv6 you get the following error:
"A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using sendto) no address was supplied."

I managed to make it work by changing the constructor of the TcpClient as follows:
TcpClient clientSocket = new TcpClient(AddressFamily.InterNetworkV6);

The above modification works with both IPv4 and IPv6 addresses but I'm not sure if its the best approach.