Mail system is broken; has been since the expansion.

paxinae

I can't seem to delete my Exchange notifications. Which is annoying, since I regularly sell things to maximize EC gain while I play. This is causing quite a lot of clutter, since I have three toons (Fed, Rommie/Fed, and Klink) and so a lot of stuff to potentially sell. All the messages across three toons goes to the same account, and it does not matter which toon I use to try and delete the messages. These messages are there, squatting, useless in my mailbox. Please remedy.