PPRuNe mailbox was full, but 'tis now empty.
I first became aware of the problem when another Goodwood-based PPRuNer asked why I wasn't emptying my mailbox. He PMd me a few times and the messages bounced, but I was never told that the mailbox was full (used to get a message telling me). Since cleaning the mailbox I can receive messages again, but no longer get notification that a new message has arrived...