I'm a huge fan of this, the waiting for rebuild takes longer than the clicking, so doing all the clicking and walking away would be a nice thing to have.
I'm talking about using an external mail system (vps) and queuing the mail when the mail server is down (which happens a lot in our case as people DDoS it thinking it's the web server)
This is my network interface
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0...