FLY Mobile- MC160
Complaint returned from email address

I have some issues which i wanted to apprise but my complaint returned to my inbox with following message:

Delivery to the following recipient failed permanently:

[email protected]

Technical details of permanent failure:

Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.1.1 : Recipient address rejected