[aidenn0]

Aha, found it[1]. This jogs my memory enough. I changed my "trash" folder to be my archive folder and could just swipe (or as the manual says "Throw the message off the side of the screen").

1: https://manualsdump.com/en/manuals/palm-pre/221591/213

[price]

Interesting! Thanks for tracking down that bit of history.