The Messaging Module now includes a feature that allows call admins to view the list of recipients for a message before the message is sent!
Just create your message like you always have. When you go to preview the message, you’ll see a link at the end of the "To" header (right) indicating how many messages will be sent. Click that link and a window will open with a list of the recipients and how many copies each will receive. (Recipients receive one copy per proposal, so someone with multiple proposals would receive more than one copy of the message.)
The link is also displayed for draft messages on the main Messaging Module page.
After a message has been sent, the link is replaced with a list of actual recipients and the delivery status for each one.