Can you make a new email distribution list and include the members of your choice? Your use of "public" leads me to believe that you are using a company database (in which case I'm not sure that I would know to do), but if not the d.l. should work. Hope that helps!
Hi there! I'm Matt, currently an undergrad in aerospace engineering. This looks like a very helpful and informative message board [edited for spelling error in very first post. I have dishonored my family]