Stupid scripting question -- FAQ-ish

[Tim Wunder]

Hi,
I have a rudimentary script that checks out and compiles the latest 
GNUCash from CVS. I'd like to have it send me an e-mail when it 
completes telling me that the new GnuCash is ready for installation, or 
that the update failed.

So, essentially, my question is: How do I send a mail message from the 
command line without requiring additional user input?

A quick search on google hasn't yielded much help for me (probly not 
using the right search terms).

Thanks,
Tim