[Videx]

It sounds like some clever coder at PHPBB has decided to rewrite the whole venerated system of mail. As long as a message hasn't been read, it's still editable by the sender.

But he erred in not renaming the boxes. An 'outbox' is where mail waits to be delivered, not where it waits to be read.

An interesting concept, but I doubt it'll catch on, because most people don't like 'read receipts', and will disable them if given a chance. Doesn't PHPBB give the reader the chance to disable the read receipt? If so, it would sit in the sender's outbox forever, despite having been read long ago.