On Fri, 12 Jun 2015 15:31:29 +0200 nicolas.biselx@epfl.ch wrote:
[2015-06-12 14:09:21,098] [ERROR] [pid=26242 nav.alertengine.alertaddress.send] Email raised a DispatcherException
[snip]
SMTPSenderRefused: (553, 'sender domain must exist', 'navcron@navappliance')
I don't know a whole lot about configuring Exim, but I think this error message is clear as day. Are you sure you restarted alertengine after changing the DEFAULT_FROM_EMAIL option in `nav.conf`?