Update: I’ve tried to establish contact with the email address “email@example.com” but got an error:
“SMTP error from remote server for TEXT command, host: mxbiz1.qq.com. reason: 550 Ip frequency limited”
But i found another address under http://www.bigtree-tech.com -> Support -> Shipment tracking: “firstname.lastname@example.org”
So far no error message.