I'm having problems receiving an email from china, and I think it might be because the email was blocked somehow. Since I am not based in China and do not have access to any computers in China, I can't test this myself. Is there a web service or tool (that's preferable free) I can use to send a test email to an email address to see if it is received or blocked by the Great Firewall of China?
Is it webmail for your website you are trying to access? The first step might be to try this test -> http://www.websitepulse.com/help/testtools.china-test.html
Should tell you if your site is blocked or not.
If it is googlemail or some other mailing service you might want to contact them directly.