POP3 (Post Office Protocol version 3), IMAP (Internet Message Access Protocol), and SMTP (Simple Mail Transfer Protocol) are three fundamental protocols used in email communication.

POP3 and IMAP are used by email clients to access emails stored on remote servers; their main difference is that POP3 employs a "download-and-delete" model, while IMAP allows users to view, organize, and manage emails directly on the server.

On the other hand, SMTP is responsible for sending emails. Together, these protocols are the foundation of sending, receiving, and accessing emails across networks and devices.

All Hostinger's servers support POP3, IMAP, and SMTP protocols and are enabled by default - make sure to check the guides below on how to use them according to your email service type: