What is quota???

what is quota i have 50 what does that mean??

Your last 3 posts should really be in the Board Questions and Business. I think the word 'quota' is misleading to use, and makes it seem as though it's suggested that you make 50 messages. The quota is just the maximum number of messages (inbox and outbox combined) that you are allowed to save. When you have 50 out of a possible 50, you can either buy more space (increase your quota) or simply delete the messages you don't want to bring it down below 50.