Thought I had found a solution, I set up an IMAP account for my Protonmail, sent the email, it arrived safely, however I now have this message.
SpamCop encountered errors while saving spam for processing:
SpamCop could not find your spam message in this email:
I have been reporting spam here for years with no problems. Now I get this
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
I double checked the address that I must use to submit them and still get the bounce.