This didn't work for me. Question: what is the email address that the server device sends from? Question: is there any other configuration that needs to be done when I'm behind a router? I wonder if this is what is not working. I entered my gmail email address as you suggested and said 'ok'. The server then said my message was being sent, but I never got it. Not in spam either.
Think of a tag as a simple category name. You can categorize your documents, discussions, and blog posts with any word or words that makes sense.