If a user has exceeded their stored private messages quota such that they cannot accept further messages until they clear some space (e.g. a new user who is yet to post to the Forum and therefore has not yet "earned" any quota, but it could be any user with a full mailbox):
- are they immediately notified of this situation?
- why is a sender of a PM to that "quota bound" user (e.g. when attempting to reply to a PM from that user) NOT advised of this situation until they try to submit the PM? (If senders were advised as soon as they attempted to create a reply to a PM from a "quota bound" user, or when the user name of the latter was entered into the recipient's field of a new PM, this would save the sender from wasting their time and effort drafting a PM that cannot be sent?)