Thanks for the response...
Yes using correct email format
It actually works If I hardcode an email address or choose from the address book but does not when I select email sender or email from a SharePoint list. I even tried setting a workflow var to email sender or email from and then referencing that var
but same issue occurs.
I also verified that that email sender/email from values were good and was able to verify this by including these in the body of the email and publishing the workflow that works (hard-coding my email address).
Thanks ~ Jose