You want to see one? An e-mail from a potential buyer, or a system e-mail from CL?
System e-mails come from
noreply@craigslist.org. When they are in regard to something you posted the subject is "Your craigslist posting ........".
Something form a potential buyer will come from their personal e-mail address and start off like this....
"** CRAIGSLIST ADVISORY --- AVOID SCAMS BY DEALING LOCALLY
** Avoid: wiring money, cross-border deals, work-at-home
** Beware: cashier checks, money orders, escrow, shipping
** More Info: http://www.craigslist.org/about/scams.html"
-Mike