SSL Exception: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

[dtrupti22]

I am trying to send mail with ssl enable using below code and getting
SSL Exception: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed error

	SecureSMTPClientSession session(mailhost, port);
	session.login();
	session.startTLS();
	if (!username.empty())
	{
		session.login(SMTPClientSession::AUTH_LOGIN, username, password);
	}
	session.sendMessage(message);
	session.close();