The problem with the domain adina.com.cn still remains the same, they have not set the MX records correctly as prescribed by RFC standards. Please check out the following links which describes the issue ::
http://www.intodns.com/adina.com.cn
http://dnssy.com/report.php?q=adina.com.cn
You can very clearly see that their mailserver settings are being reported as having issues.
Please note that we do not have any special configurations on our servers. All boxes are cpanel installed server with exim mailserver running in its default and internationally accepted standards. Gmail and other providers have their own configurations set to meet a very wide range of users. Any changes we make to the server settings will result in spam and email attackers to filter in much easier, and even may result in emails from our server to be blocked in the same format. Morever cpanel updates are running everyday and it will simply override the tweaks to correct non-standard formats.