KB19418: No errors are reported when any e-mail service runs however no emails are delivered in MicroStrategy Narrowcast Server

SYMPTOM:
All services configured to deliver e-mails appear to be running correctly but the e-mails are not delivered in Strategy Narrowcast Server.
 
Neither the DELog files, nor the System Message Viewer, report any errors. However, an e-mail sent manually as per the following Strategy Knowledge Base technical note is received successfully:

• KB11482 - How to deliver an e-mail manually for SMTP troubleshooting purposes?

 
CAUSE:
One possible cause for this behavior affecting all e-mail services using the same Information Transmission Module (ITM) is that the 'Message Output' for the ITM has been set to 'Save to File' only.
 
By default only the out of the box 'E-mail (SMTP)' ITM is available for e-mail services. Additional ITMs can be created and they should be checked in the same manner. To check the default 'E-mail (SMTP)' ITM perform the following steps:

• Open the Narrowcast Administration console and navigate to Administration --> Information Transmitters.
• Edit the 'E-mail (SMTP)' ITM.
• Make sure the Show Advanced Properties checkbox is checked, and go to the 'Message Output' tab.
• Check if it has been configured to only 'Save to File' as follows:
  

 
ACTION:
Change the 'Message Output' to either 'Send to Recipient via SMTP' or 'Do Both (Send to Recipient and Save to File)'. The first option will only send the e-mail but will not save a copy to a file in the 'Save to folder' path, the latter with send the email and save the file.