Well - all those settings have nothing to do with pruning the inbox or the sentbox. There is also no setting which can influence that boxes (nor inbox neither sent box - although it looks like a good idea to have such a setting in your profile 🙂 ). Your inbox is regularly cleared - deleting messages older than 30 days[nb]I just have the dates in my memory and that are roundabout figures because I saw no reason to remember the exact values :)[/nb] Uwe is right too - for moderators the PMs are not pruned because it happens regularly that request-answering takes more than a month and it is necessary to re-read what answers were given (or detailed questions ere asked) longerthan a month ago. Be glad that your PMs are pruned though, my inbox has currently 530 PMs and my sentbox has 4732 PMs - the complete size is 8.20 MB 😞