How can’t the mailbox open a matter????????

What I apply is 163 free mailboxes, before has been possible to use, now input the user name and the password said that this website certificate had the question, the address error….
Downloads the certificate to try http://ebank.spdb.com.cn/certificatelink.htm Reference:
Also once had this kind of situation.
If the user name and the password do not have question, later tried several times to be possible.