Thank you! How recently was this change made? I could still do it in 2018, but I wasn't able to do it just now. As you say, no signature on the message, which

Thank you! How recently was this change made? I could still do it in 2018, but I wasn't able to do it just now. As you say, no signature on the message, which makes my DMARC record do something useful. That's really great, a huge relief. (Wish I could modify my original post now).