Freron MailMate

I have a flaky trackpad and a complicated hierarchy of fairly large mailboxes, and sometimes when I'm dragging a message into a mailbox my trackpad decides that I stopped dragging halfway through. When this happens, the message I'm dragging gets dropped into whatever random mailbox the cursor is over, which isn't the end of the world, but there's about a 25% chance that the trackpad will then start a new drag from that point, which means it'll drag that intermediate mailbox over into the final destination. If there are a lot of messages in that intermediate mailbox --- and some of my mailboxes have hundreds of thousands of messages --- then that's a very expensive operation (because of IMAP) which might take anywhere from minutes to hours to complete. It's very rare that I want to rearrange my mailbox hierarchy, so it'd be nice if there was some way to lock the entire thing.