I recently experienced irate users who were unaware that their mails had not been sent due to some ISP issues.
The users were workign remotely and replicated to send mail.
They were upset because Notes never tells the user in an obvious way that their mail has NOT been ...
I would like to see the mailbox views become composite. For example, I like most work mainly in my Inbox, but would like to see just the last few (say 5) messages of my Sent at the same time.
Currently you can decide to keep sent items per default, or not or be prompted. It could be interesting to have a fourth option telling to keep a copy of your sent items but without the attachment(s). It/They could be replaced by a placeholder telling which one(s) has/have been deleted such ...
I would have the "send and save" options like iNotes on Traveler for Android devices, and will be very helpful to see sent mail messages in subscribed folders.