[request] List of players with mailboxes #25

I love this mod. I however do wish we get a list of players who have mailboxes, or the list of snailboxes around the world. I'm in a server with over 50 members, and I'd love to know who I can send mail to or if I have a bulk message to send. Maybe instead of writing someone's username in the address box, we can instead click a button to list the snailboxes in the server? Maybe even have a feature where people can toggle private vs public snailbox so they can choose whether they want their snailbox to be on the list