Yes, the winklink.org address is valid.
I can send to it from my gmail account, using the web interface to gmail, and all works fine.
When I send from D-RATS, with the email addressed only to that CALL@... address, it sends from D-RATS.? My D-RATS is configured to use my gmail address.? Gmail sees the sent mail, it is sitting in my gmail account's "sent" folder.??
However, the mail never seems to arrive at the Winlink account I am sending to.??