Question

how e-mail is send one computer to another computer ?​

Answer 1

Answer:

If the data you're sending to a destination IP address (another computer) is on the same network you're on, then your computer (the source) sends the data packet directly to the destination. The IP address is resolved to a physical address using ARP and the data is sent to the other computer network adapter

Answer 2

Explanation:

When an individual or an organisation sends a email, the message travels from it's point of organisation, such as an email client where it was composed, across to internet to it's destination. Along the way, it passes through multiple servers that help insure that it arrives at the right place.