Track un-answered emails ?

[tony]

Hello,

Is it possible to track un-answered emails with standard Outllok (or
an add-in, I'd prefer standard though) ?

Basically, I want to be able to flag emails I send to show me a
reminder within a time frame (say 3 days), but of course I'd only want
to be reminded of the emails I did not get a reply to.

I know the "follow up" functionality does this, except it reminds me
of all emails flagged, not just the un-answered ones.

Is it possible to do this ?
Thanks
Antoine