This is list is not moderated. Many students are new e-mail users and it is likely that there will be mistakes. Give friendly advice. Keep your posts friendly even in heated discussion. The Salmon issue is not easy to understand or solve.
Reasonable discussion is always a good place to start.
When making a reply, be sure to determine whether you are replying to the list or to an individual. When replying to an individual send the message to the email address listed for the person you are writing to.