Use the senders' email address for replies: NOT firstname.lastname@example.org
The above email address is where my "Thank you" for the card was sent: Why isn't the senders' email address used as the reply address, please?
Who sent this card?
What is Hallmark mailing address for a person who has no email access?
According to the "completed" box, it appears that the suggestion "using the sender's email address for replies" was implemented, however it has not been. Any replies still go to hallmarkecards. 10/27/2014