Okay I found a way to view email in landscape mode but you’ll have to retype it everytime you quit the app so you must really want it.
“A PreCentral tipster discovered that entering “RocknRollHax” on the keyboard (and yes, capitalization is important here) while in the email app enables the previously missing capability to use it in landscape mode; presumably Palm hid it from end users because they thought it was too buggy or weird for mainstream use, but it certainly works alright for us.” Hope I helped.
By the way, this was typed on an iPhone.