Dear Ponli_____ Thank you so much for __________etc..
I have genuine heartfelt Hakoras Hatuv to you for___
and I wished to acknowledge your thoughfulness in writing.
I truly appreciate the __(time &/or effort) (or wonderful gift)
you gave to me/ put in to (whatever).
May HB”H bless you and your family with happiness and health,
and hatzlacha in all that you do.
sincerely C Shapiro
P.S. It is very hard to write when you don’t know what your writing about. Fill in the blanks, Hatzlacha!