/etc/hostname

[Tom Allison <tallison@tacocat.net>]

My /etc/hostname file contains only the machine name and not the FQDN of 
the machine.

This is causing problems with procmail, squirrelmail and probably 50 
other things out there.

How do I set this once and for all?
And should it be a FQDN or just the machine name?

I'm actually thinking it needs to be the machine name only because if 
you are running multiple domains on a machine you need to be able to 
tell the difference for email and web services.