>I exchanged messages with Rick Strahl and he confirmed that it is possible that the reason for the above problem/message is that the Email Server was locked up or had some issue. What I don't understand is the "mechanics" of why VFP shows the message "Switch To" "Retry"? What does VFP app "suggests" to "switch to" when this problem occurs? If you know, please, explain. Thank you.

It's a Windows message, not a VFP message. You can get it without VFP being involved. Google the message and you'll see lots of people asking about in other contexts.

Tamar