Bug report email address invalid

cpf has reported a problem with itself twice recently and asked if its ok to send a bug report to ‘cpfbugs@comodo.com’
and twice the email has been bounced back to me marked as undeliverable.

Do you want the bug reports, a zipped file containing crash.dmp and trace.txt, or not?

If you do want them what address should I use? Why is the address the firewall has been trying to use not reachable?

Thanks for many months of uninterrupted service.