Can we increase the number of PM’s we have to 10 from 5. It’s getting really annoying.
It was set to allow you to save 70.
I bumped it up to 100.
Check your trash. Deleted items count towards your number of saved private messages. I’d suggest clearing that out every once in a while.
If I totally missed the mark on this one, re-clarify what you were asking 
Isn’t it if you get a new pm and your inbox if full, it just deletes the oldest one? - Or does it deny sending the pm?