What is the biggest number of letters that can be in my inbox? Can I have 200,300, or I have to delete them?

i'm sure that if your email inbox gets too full you will be told. i don't know if there is a maximum. i usually delete the 'x is a fan of you' or 'x is a fan of you too!'emails when i'm done with them, cause they are a little pointless.
i don't know what will happen if your inbox gets too large, but as far as i know there is no limit.

i had about 1200 messages in my inbox and it wasnt full so i'm guessing a lot xxx