I have a program on an MFP that uses SMTP to send emails through MS Exchange 2010 R3 server. My SMTP settings test fine and the emails go through my program without any failure. However, the emails are not being delivered. There are no indications of a failure throughout the entire delivery process (from MFP program to Exchange Server) and delivery reports from my program indicate messages as being sent. They seem to simply disappear somewhere. MS Exchange Troubleshooting Assistant also indicates emails as being delivered but they most definitely are not being delivered.
I've run out of ideas and fixes to test. Is there perhaps another application on my server that could be blocking the emails? If so, wouldn't I get an "email failure" notification from somewhere? Is there specific applications I should be looking for?
Thank you in advance for any help given.