I’m disappointed in this answer, too.
OK, I have a slightly different approach – two questions.
1. How can I make the list of recipients under ‘Directory’ into a multi-select list? Currently it only lets me click ‘send message’ on one person at a time.
2. How would I create a group sending facility? For example ‘all editors’ or ‘all contributors’?
I thought paying for Pro would offer more flexibility. I’m happy to amend the code if instructed, but I don’t feel I should have to pay a developer for group sending facilities in a group messaging system 😉 Hope you can instruct, FEPM!