On my PC and in the browser, you can Pin an important email to the top of the Inbox until dealt with.
Why doesn't the BT Email app on my Android phone support Pinning?
You would be better asking the developers on the BTMail app on the Google Play Store.
This is a BT residential customer to customer forum. Your post does not go to BT. The only BT staff are the forum moderators who do not necessarily read all the posts.
However I will keep your coments in mind should you post seeking assistance in future.
Good morning @DaveOrr!
I've fed this back to our email team so we can be 100% sure, and they've confirmed that at present it's not something we support via the BT Email app.
If anything were to change we'd be sure to let you know, though!
Peter