[H-GEN] Email delivery question

[Benjamin Fowler]

Hello all,

I have what seems like a straightforward question, but the answer
appears to be elusive (in Google at least!)

I've got a home server with a disk array filled with cheap hard
drives, and if anything untoward happens, I want to know about it
ASAP, typically via my Gmail account.

What's the typical setup for forwarding all email for the root user on
a home Llnux server (Debian-powered in my case) behind a NAT firewall,
to a regular email account, without a smarthost upstream? Is it even
possible?

Cheers, Ben.