Hi acejavelin,
Thanks for your reply. I assume a mailbox for a "phantom device" is an "associated mailbox", which is why I'm unable to configure the message notification extension field? If we can have a mailbox without a phantom device, I'm not sure why our phone supplier set it up this way.
I managed to figure out what I was doing wrong with e-mail notifications. Firstly, I'd set the SMTP server to the server's IP address. That's not allowed. At this point, I also noticed that the phone supplier hadn't configured our DNS settings - they'd been left as defaults and even if our firewall hadn't blocked outgoing DNS requests, our e-mail server is internal so an external DNS server wouldn't have returned the internal IP address in its replies. Then I set it to the hostname of our mail server... which contains an underscore... also not allowed. So I finally figured I'd create an alias (CNAME) DNS record for our SMTP server which didn't contain an underscore. Bingo.
Personally, I think e-mail notifications will be of more use to us anyway.
Looking at the "mail.mainlog" log file that's available from the Mitel 5000's embedded web server was a massive help, pointing me to each roadblock I came up against. In the end, if I'd known about the rules surrounding the SMTP server name and the DNS server had been configured correctly, setting up e-mail with UVM would have been so easy.
Hope this thread helps someone else out there.
Matty Brown.