The labeling of the PM boxes/functions is counter-intuitive.
Here's the way I have tried to explain it to myself.
1. Click on "PM" and a form appears. You type your private message. Then you have two choices: "Preview" and "Submit".
2. When you're satisfied with the contents, you choose "Submit."
3. The message then goes into the site's "mail sorting facility." A copy of the message goes into your Outbox. Every message in the Outbox has a gold bell next to it--meaning that the message has not yet been opened by the recipient.
4. When the recipient actually opens your message at his end, your copy of the message will go from the Outbox to the Sentbox. All messages in the Sentbox have a white bell next to them. This indicates not only that the recipient got your message, but also that he opened your message.
5. If you don't go through the steps necessary to save messages sent and received, messages you receive will stay in your inbox. If one message remains there, you will continue to see that "You have 1 private message(s)." After a while that becomes annoying; so you either delete the message you've already read...or you save it.
6. If you don't save or delete messages you send, they will accumulate in your Sentbox. If you save them, they will accumulate in your Savebox. Six of one and three dozen of the other--as they probably teach under "No Child Left Behind." :wink:
7. The trick to the PM system is to remember: Inbox-Outbox-Sentbox-Savebox.
I have never tried to edit a message already in the Outbox. Before I try that, perhaps someone can test the mail system and see whether they can send me a bottle of 100-proof vodka.
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Note to johnbohnrevenge, after his posting below:
You have described the workings and function of the Outbox succinctly.
I would add one point to your good explanation. Technically, the recipient merely has to open his incoming message in order to have it considered as "read." It's his choice whether to experience the pleasure (or endure the pain) of actually seeing what the incoming message contains.
johnbohnrevenge wrote:No, PHPBB handles outbound messages by storing them in the Outbox (no limit on your part) while they're still unread by their recipients.