Email Timestamp or Replacement

I spend a lot of time in places with marginal cell coverage, meaning my battery dies very quickly, and I am not always able to charge often. I'd like to turn my BB off when possible, but the fact that email messages only display the time they are received on the device is a real problem (I get a lot of messages and really need to know when they were sent).

Is there anything that can be done... besides opening each message and scrolling up to the "Sent" field in the header?

If not, is there a 3rd party email program that can display the message list and uses the "Sent" field? I am aware of two replacement email readers but both only affect the display of individual messages.

I use an 8830 but think this topic is common to many/most BB models.

Thanks!