I tried to send email to firstname.lastname@example.org to resolve an issue and it was rejected.
The mail system <email@example.com>: host mxbiz1.qq.com[184.108.40.206] said: 550 Mail content denied. http://service.exmail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000726 (in reply to end of DATA command)
Google Translate leads off with
Reason for error : The content of this email is suspected of being sent in large numbers, and has been complained by most users as spam.
Content consisted of text describing the issue, logs demonstrating the issue, a JPEG image of the label of the device, and a PDF of the Amazon (US) invoice.
How can I resolve this?