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SMTP
SMTP (Simple Mail Transfer Protocol) is an application-layer protocol used for exchanging email messages between computers. It is responsible for managing t...
SMTP (Simple Mail Transfer Protocol) is an application-layer protocol used for exchanging email messages between computers. It is responsible for managing the exchange of electronic mail between users, either within an organization or across the internet.
How SMTP works:
An email message is composed and saved in an email client on a user's computer.
The email client uses the SMTP protocol to send the email message to an SMTP server.
The SMTP server acts as an intermediary, relaying the message to the intended recipient's SMTP server.
Once the message is received by the recipient's server, it is delivered to the intended recipient.
Key features of SMTP:
Port: SMTP uses port 25 for outbound communication and port 465 for inbound communication.
Authentication: SMTP uses authentication mechanisms (e.g., username and password) to verify the sender's identity.
Security: SMTP follows a secure protocol (SMTPS) to protect sensitive information, such as passwords and credit card numbers.
Examples:
When you send an email, your email client uses SMTP to connect to an SMTP server in a remote server.
When an email arrives, the SMTP server relays it back to your email client, which then displays it to you.
When you receive an email, the SMTP server delivers it to your inbox.
Conclusion:
SMTP is an essential protocol for enabling communication between computers for email exchange. By understanding how SMTP works, you gain a basic understanding of how email messages are transmitted across the internet