How do I suppress List (content of) email addresses appearing in sent emails ??

I send emails to a couple of Lists. I include my email address in the List to see what the email looks like at the other end and for my records. However some people in the List might object to their email address being made public to all the others in the List in such sent emails. How do I suppress Thunderbird from "unravelling" all the email addresses in the List in such sent emails ? It could just use the List name but with no details of List content ??