Mailing list question

[Roberto Sanchez <rcsanchez97@yahoo.es>]

I want to setup a real basic mailing list for the users in my lab. 
There are only about 10 of us, so I would like to do something 
/etc/aliases.  Is this possible?  Do all the users need to have local 
accounts where the mail gets delivered? or can I just do something like 
this:

list: billy, bob, user1@someplace.com, user2@otherplace.com

Will that even work?  I don't want to go to the trouble of setting up a 
listserver, since there are so few of us and it will be infrequently used.

Any suggestions would be appreciated.

-Roberto

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