Hey,
we accumulated over 800 messages (we responded to them but never deleted them)
and we wanted to delete them but can only see/delete 10 of them at a time.
A few other seasoned users confirmed that no such option is currently available.
So we'd like to suggest either increasing the amount of messages a user can
see/delete on the message portal to 100 or at the very least allow users to
have an option to choose how many messages they see per page from a dropdown
menu.