As both my wife and I suspected, the cause was PEBKAC. She started to edit an email BEFORE clicking Forward. She ran into a similar difficulty today but I was able to see what was happening. She is great with animals, having tamed two feral cats and two feral snakes. So, she thinks like a cat and thinks like a snake, but she doesn't think like a computer. I won't ask what she thinks about me! (Quip: Never feel guilty because you have thought ill of your wife. She has thought much worse of you.)


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365