SMTP (Simple Mail Transfer Protocol) is a standard protocol for transmitting email over the internet. It is used by email clients, such as Microsoft Outlook or Apple Mail, and email servers to send and receive emails.
SMTP is a client-server protocol, which means that an email client sends an email to an email server, which then delivers the email to the intended recipient. The email client and server communicate with each other using a series of commands and responses that follow a specific format.
When an email is sent using SMTP, the following process occurs:
The email client connects to the email server using a network connection, such as TCP/IP.
The email client sends a message to the server indicating the sender and recipient of the email, as well as the subject and body of the email.
The server checks that the recipient's email address is valid and, if it is, sends a message indicating that the email has been accepted.
The server delivers the email to the recipient's email server.
The recipient's email server stores the email and, if the recipient has their email client configured to check for new emails automatically, the email will be delivered to the recipient's email client.
SMTP is a simple and widely used protocol for transmitting email over the internet. It is an essential component of the modern email system and is used by millions of people around the world to send and receive emails every day.
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