Final answer:
The two protocols used for emails are POP, for retrieving emails from a server, and SMTP, for sending emails to a server or between servers.
Step-by-step explanation:
The two protocols used in the process of sending and receiving emails are POP (Post Office Protocol) and SMTP (Simple Mail Transfer Protocol). POP is typically used to download emails from the server to the email client, making it possible for a user to access email messages even without an internet connection. On the other hand, SMTP is the protocol responsible for sending email messages from the email client to the email server, and from one email server to another. So when you send an email, you are using SMTP, and when you retrieve an email from your mailbox, you are often using POP.