SMTPClient client = createClient();
client.connect(address.getAddress().getHostAddress(), address.getPort());
assertTrue(SMTPReply.isPositiveCompletion(client.getReplyCode()));
client.noop();
assertTrue(SMTPReply.isPositiveCompletion(client.getReplyCode()));
client.quit();
assertTrue("Reply="+ client.getReplyString(), SMTPReply.isPositiveCompletion(client.getReplyCode()));