A mail server is a software system that sends, receives, and stores emails for users, acting as an intermediary between email clients and the internet. It uses protocols like SMTP, IMAP, and POP3 to manage email communication and ensure reliable message delivery and retrieval.

Mail Server

mail server

software system

Sends and receives emails

stores emails

Email clients are software applications used to manage a user's email, allowing for sending, receiving, and organizing messages across various accounts. They offer features like email filtering, encryption, and integration with other tools and services to enhance productivity and communication efficiency.

email clients

the internet

SMTP, or Simple Mail Transfer Protocol, is the standard protocol for sending emails across the Internet, facilitating communication between mail servers. It operates over TCP port 25 and is responsible for the transmission of email messages from a client to a server or between servers, ensuring reliable and efficient email delivery.

SMTP

IMAP, or Internet Message Access Protocol, is a standard email protocol that allows users to access and manage their email on a remote server, offering the ability to sync messages across multiple devices. Unlike POP3, IMAP enables users to organize emails into folders on the server and access them from any device, ensuring that changes are reflected universally.

IMAP

POP3, or Post Office Protocol version 3, is a standard mail protocol used to retrieve emails from a remote server to a local client, allowing users to download and manage their emails offline. It operates over TCP/IP and typically uses port 110, with the option of secure communication through SSL/TLS on port 995.

POP3

manage email communication

reliable message delivery

Message retrieval involves the process of locating and extracting specific messages or information from a larger dataset, often using algorithms or search queries. It is crucial in contexts like email management, database querying, and digital communication systems where large volumes of data need to be efficiently accessed and managed.

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