Email routing is the process of directing email messages from the sender to the recipient's email server. When an email is sent, it travels through various servers and networks, using specific protocols to ensure it reaches the correct destination. This involves looking up the recipient's domain and determining the appropriate server to handle the email. Once the email reaches the recipient's server, it is stored until the recipient accesses their inbox. Email routing ensures that messages are delivered efficiently and securely, allowing users to communicate effectively across different platforms and devices.