My carrier give me 5mb free data usage per month,how many email(only use for chat) can i send and receive a day.

Thanks

If only email a good bit, but beware if your bits are used for browsing as they will go very fast

only for email,no attachment,no browsing

A lot....One email, text only is only 1kb at max.....so, you can send at least 150 emails per day....