Since a recent upgrade, where I skipped a few MacOS generations in transitioning from a 2012-vintage Macbook Pro to a newer M2 model, I’ve had a persistent problem with sending email messages to mailing lists from my Contacts app.
Whenever I try to send to one of my larger lists (a dozen addresses or more), several addresses on the list are always missing from the message. For each particular list, it’s always the same addresses that are missing. I tried removing those cards from a list and re-adding them, and also creating a whole new contact list, and neither solved the problem. Any suggestions??