FYI EVERYONE:
My daughter, Candice --our family's computer expert--(thanks honey) sent me this link DMARC which sort of explains what is happening when we try to answer email commenting and getting refused delivery.
I guess YAHOO and AOL have had major issues with spam (they call it computerbot) and have put this security in place--I don't know if any of you can authorize our re;lies...but I thought I'd post this follow-up for you. ( Sorry for typos--posting with only RH--LH in a thumb/wrist brace. )
Hugs, Julierose, La Blageuse-