SMTP (Simple Mail Transfer Protocol)

SMTP, or Simple Mail Transfer Protocol, is an Internet standard communication protocol used for sending and receiving email messages. It defines how email is transmitted between servers and from email clients to servers.

Here’s a quick overview of how SMTP works:

• Email Client to Server: When you send an email, your email client (like Outlook or Gmail) connects to an SMTP server.
• Server to Server: The SMTP server then communicates with the recipient’s email server to deliver the message.
• Email Retrieval: While SMTP is used for sending emails, protocols like IMAP or POP3 are used for retrieving them from the server to your inbox.

SMTP typically uses port 25 for server-to-server communication and port 587 (SMTPS) for client-to-server communication.