You maximum email limit is limited to total file size combined ... 100 GB! The maximum file size for 1 email is 25 MB! So unless her 2000 emails contain thousands of pictures, videos, music, etc. she has nothing to worry about. It will not bother the computer however you would probably receive a warning from AOL about getting near or exceeding the limit. My email server is only a tiny fraction of yours and I always get warnings.