Sähköpostitunnus

Sähköpostitunnus, often referred to as an email address, is a unique identifier used to send and receive electronic mail. It is composed of two main parts separated by the "@" symbol. The part before the "@" symbol, known as the local-part, typically identifies a specific user or mailbox within a domain. The part after the "@" symbol, called the domain name, specifies the mail server or organization responsible for handling the email. For example, in "[email protected]", "example" is the local-part and "domain.com" is the domain name.

Email addresses are essential for digital communication, allowing individuals and organizations to exchange messages across the internet. They are used for a wide variety of purposes, including personal correspondence, business communication, online registrations, and service notifications. The structure of an email address follows specific standards to ensure interoperability between different email systems. When sending an email, the sender's email client or service looks up the recipient's domain name in the Domain Name System (DNS) to locate the mail server responsible for that domain. The message is then routed to the appropriate server and delivered to the specified local-part. Maintaining the privacy and security of one's email address is important, as it can be used to access personal information and accounts.