Letterboxes for individual houses/ flats
Currently, mail is sorted by the first letter of your surname. This creates a problem as it is often easy to miss your mail. It also means that it is a time consuming process to sort through the all of the post before finding your own (especially when you have a popular letter as the first letter of your surname).
I know many students who have given up checking their mailbox regularly and only look when they are expecting mail, which further fuels the issue as more post gathers.
I suggest that the letterboxes in the porters lodges are sorted by house/flat numbers and names. This will mean that there is far less mail to sort through and you can also inform your housemates of any mail that they may have.
I believe that this would be possible for most colleges, as Grizedale for instance has 2 overflow boxes for each letter which could instead be used for the flat/houses names or numbers.
This would make collecting mail far more straightforward and efficient, as picking up your post should be.