Getting this NDR when trying to send an email to an external contact;
550 5.7.800 Your message has been rejected due to the contents contravening our privacy policy for PCI DSS 2.0 requirements
I have not seen this NDR before and I don't really know where to start looking!
Mail has been sent to this contact before on a regular basis and all other mail is flowing fine. No changes made and no updates or patches applied.
For info this message is being generated by my Exchange and not the recipients.
Any ideas?
