It's a very good idea, for those of us who have many pages, as otherwise your suggestion requires lots of repetition for lots of pages. +1 from me, and hopefully we'll see more admins interested so we can get DirectAdmin staff to agree .It's not a bad idea actually.
With a general 'Purge'-button, it will also be possible to easily delete a perhaps important message on a page somewhere.
I don't recall I've ever had enough messages to see pagination kick in, even after a week orso checking. My server probably doesn't draw that much traffic.
Therefore, the question I would be asking is;
if one has that many pages of messages everytime... Why not try to fix the cause of all those messages first?
Well I do want the backup mail to be there; it's the way I check if all my boxes I manage get backupped. That way I don't have to manually check each box every day.
The one button to simply delete all messages seem to be not that much of trouble to make and seem to satisfy many people.
cd /usr/local/directadmin/data
cp -Rp tickets tickets.backup
cd /usr/local/directadmin/data/users/[B]username[/B]
cp -p tickets.list tickets.list.backup