Hello all, greatly appreciate your timely response and expertise! Really means a lot.
I chose to experiment two changes: Used a different email (msn.com vs hotmail.com) as my WordPress blog administrator as well as used a new customizeable form via the WPForms plugin.
Emails are now flowing. I will retain your comments in case I need to also use one of the SMTP plugins you recommended. Thank you again…SO MUCH!
Chris