I prefer not to install much of anything on these voicemaial systems. I have heard other people doing it, but if you had any issues with the OS booting, then you are out of a voicemail system. One time I had installed an Internet time sync because the local time kept drifting.
I also believe that these systems are pretty under powered. They are fine for what they are designed to do, but add any other service, and I believe you are pushing you luck (personal opinon).
That being said, the Stratagy can not send using authentication. You can send it to another server, such as another local machine running IIS, that will relay the message to the other server. I have never used that SMTP software so I can not help you there, but I would imagine that the idea is the same, to use it as a relay service.
Last edited by newtecky; 11/08/12 02:59 AM.