I have 2 linux machines, and an OS x machine (beehive, think and ibook)
that I want to send mail between. they are all on a local network not connected to
the Internet (ibook and think can dial in though) with no local DNS. They can ping
each other, FTP each other, Telnet each other. By name. (hosts files)

Can I have them share email?

Is sendmail what I use to transfer mail between machines?

Is it correct for jay on think to send email to

jay@beehive


If so is there a "Dummies Guide to sendmail" website?

well sendmail isn't fun, i'd suggest a nicer MTA, like postfix, qmail or exim. and well it's not normally a case of sending mail between machines, but having a central email server. now if you DID want to i guess you could have an email server on each machine, but it's not really a nice way to do things as mail is for a user not a machine, and a user could come from anywhere. so you'd just nominate a machine as a mailserver and set an mta up on it. you'd then just tell each mail application where the smtp server is, even by ip if need be, and off you go.