Sent Mail vs Outbox

[greenbean]

In the PM system, when I send a message a copy usually appears in the "Sent mail" box. But every once in a great while, it appears in the "Outbox." Does that mean it was not sent? Or it is waiting to be sent. What gives?...

[BGuttman]

Messages in the Outbox are waiting to be picked up. When the recipient picks up the message it moves to Sent.

[SGlong]

I was also confused by that. Thank you for clarifying.

[Ted]

I've send two pm last days, but both outbox and send mail are empty. Can I assume none are send?