PM’s not being sent

toon – i thought i had this problem too, but was advised that its up to the recipient to access the PM before it is posted as SENT.

Baglimit is correct

When you send a PM it sits in your Outbox. The PM will remain sat in your Outbox until such times as the intended recipient opens it via their account.
Then it get shifted to Sent items.

If, say, the intended recipient is offshore for a few weeks and cannot access the site, the message may well remain sitting in your Outbox for weeks also.

Yes it also makes sense to me as well as well as sence.

toon – you could also take the paranoid view, and that the receipient, seeing who it is from, ignores it and leaves your message unread.