Simple Mail Transfer Protocol (SMTP) is the standard protocol used for sending emails across networks, ensuring reliable and efficient email delivery. It operates over the Internet's TCP/IP protocol suite and is primarily responsible for the transmission of messages between mail servers.
Internet Message Access Protocol (IMAP) is a standard email retrieval protocol that allows users to access and manage their email on a remote server, enabling synchronization across multiple devices. Unlike POP3, IMAP maintains email on the server, providing advanced features such as folder management, message status tracking, and server-side searching.