I often find the best "cure" for unusual hosted email situations is to get an email address from your ISP... like mitel5000@ispprovider.com
- They usually provide 5+ free for commercial accounts
- They usually allow open SMTP (Port 25) with plain text authentication
- Their servers rarely change (smtp.ispprovider,com)
- Their email servers have valid MX records so the relay emails never get rejected
Trouble is, they have two domains. They use one for the phone system email address and the other for users. I tried them in the format you recommended but nothing. I also tried our own settings and nothing. The system is connected to the network so I would assume it's connected to the internet, but this is my only idea, that for some reason, it isn't. Unfortunately, I don't know how to confirm whether or not it's on the internet, only if it's on the network. Is there a way I can send a ping from the phone system?
And yes, I have looked at vmail logs and didn't see anything helpful. They are set up for forward & copy so as far as I know there is no way the phone system would report on it if there is a problem with sending the email?
Connected to the network does not necessarily imply being connected to the internet... You will need to verify the IP information (gateway, subnet mask, DNS settings, etc), VLAN, routing ect.
You cannot "send a ping" from the phone system, but you can setup NTP time synchronization, if it works it is a pretty good indication that the system can get to the internet.