suppose the following are the use cases -\n\n* send and receive an email\n* add an attachment\n\n\nThe following is the usage -\n\n* 100M users and 10M active users\n* 30M emails per day\n* 1 in 5 has an attachment to it - attachment max size is 2KB\n* email content avg size is 500 chars\n\n\nDesign an Email system with the above requirement \n**Please share your answers as I am not sure what would be the best possible answer.**

suppose the following are the use cases -\n\n send and receive an email\n add an attachment\n\n\nThe following is the usage -\n\n 100M users and 10M active user

Google | Onsite | System Design: Design an Email system like GMAIL?