Thanks, whoever you are

Yesterday, Fathers Day, someone sent me a Hallmark e-card. Sad to say, when I click on ". . .open here" I get a message saying it doesn't work.
How can I thank someone or think kind thoughts about them when I don't know who they are? Now I may get messages from three or four people saying they sent the card.
The point of this is to make whoever sent it aware that I am not an ungrateful, insensitive clod. I may be a clod but I'm a thoughtful clod.
I did notice one thing about the message saying I had received a card: Hallmark does not know how to spell "received." Other than that morale booster the experience has been a washout. The moral of the story is never trust anything beginning with e-.