Even without providing an SMTP server the Stratagy will attempt to send the message directly to the domain of the email address provided in the UM tab of the user. A growing problem is when companies are using cloud based exchange servers. Often the message delivery is rejected as spam. Some IT guys will provide an account on these servers, but the Stratagy can not do athentication.

In some cases I have used the SMTP address of the ISP for that company. If you are on that network, sometimes they will allow the use of their SMTP without athentication.

Also, by default there is no domain setup for the STratagy. This will cause the message to be rejected by some SMTP servers. I actually found out it is sometimes better to use a domain that is not part if the company, something made up like stratagyvoicemail.com. If you use the same domain as the company, the SMTP server will check the name (Usually call "Unknown" or a caller ID) and reject the message due to that user not being part of their network.

Best start is to fill in the email address in UM tab, SMTP if you have one. Do a test. If no email is recieved,then check logs or run a trace.