only launch and check mail when there is network connection

well, currently gm-notify fails silently (only log to stdout) if it can't connect to the server. This is intended, because normally a user doesn't want to get interrupted every 5 minutes by a mail notifier, telling him that he can't fetch the mails... Moreover if it tries to connect but there is no network it doesn't generate any traffic.
I think it's a really minor issue that should be done when almost everything else is working ;)

I didn't mean disturb the user every 5 mins, Network Manager will inform the user when there is network. We do however need to warn the user when running configuration verification without network.

When there is no network you can launch and wait for NM to signal you over DBUS i believe and then start checking.

If you really intend this to be a "highly Ubuntu integrated" mail notifier, then it needs to support this. I would imagine it's rather trivial as well, since Network Manager sends the signals via dbus. gm-notify should not try to connect over and over again (currently based on what, a timer?), even if it is silent to the user. It should only do it once, when a network connection is actually available. Then, if it tries to connect and is unable, it *should* notify the user somehow just in case there was a typo or something.