I've had my unit about a week and still learning how to use it. Have had a really odd thing happen with some emails to my 3 sons, all have gmail accounts and were sent to them via my own gmail account.  These were all plain text with no attachments or unusual words that I can see.  When I didn't hear back from them to my questions I called them to investigate.  They discovered the missing emails from me in "Spam" and we're trying to figure out why because that has never occurred previously.  Question to the group - might Google gmail be looking at the route traveled for the emails I sent through my Deepernetwork processing and decided to flag them?  What would I white list or configure in the unit so it allows sendmail to work normally?
I'm also now testing with a different domain and non-gmail type account.