Probably being very thick here but what is the Outbox?
I wrote a message which I thought I had sent but it's sat in the Outbox where as other messages I've sent I can see in the Sent box... how can I send a message from the Outbox and what is its purpose - is it like a draft's folder?!?
ANSWER
If it's in your outbox you have sent it.
A PM will stay in your Outbox until the intended recipient opens it. It then moves to your Sentbox.
You can only reply to messages in your Inbox
I wrote a message which I thought I had sent but it's sat in the Outbox where as other messages I've sent I can see in the Sent box... how can I send a message from the Outbox and what is its purpose - is it like a draft's folder?!?
ANSWER
If it's in your outbox you have sent it.
A PM will stay in your Outbox until the intended recipient opens it. It then moves to your Sentbox.
You can only reply to messages in your Inbox