Hi Don! Just to confirm, are you using Gmail or another service?
There are two steps needing undertaken in order to resolve this issue.
Step 1: Configure Google to allow connections from "less secure apps."
Step 2: Setup an "application password"
That will take care of the issue for you! If you run into any trouble or have additional questions, please let me know.
Apologies...it looks like one of my links went AWOL in that last response. Under STEP 2, bullet point 1, the link you need is: https://security.google.com/settings/security/apppasswords