Emails sent from inside FreeToastHost3

When I send an email from the website to Club members, an error comes up.  It says my email address is (non-working and invalid).  However, as Club EVP, I regularly assign meeting roles and receive an email response to those  assignments and to role assignments chosen by other Club members.  The message doesn't make sense.  What is that message telling me?
Waldo

Without your club number we can do nothing for you.