I am always out of Forum PM space and it sucks.
I think it's just one of the oddities of using 2001 forum software. They should give us more PM Space, it can't be more than a few dozen kilobytes
Note that deleting PMs from your inbox doesn't actually free up space, it just moves them to your trash can. However, deleting PMs from your trash can does free up pm space.
I am aware and deleted a lot. I think its not too unreasonable to request more space
