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What is SMTP

 

SMTP (Simple Mail Transfer Protocol) ek protocol hai jo email bhejne ke liye use hota hai. Yeh email communication ka backbone hai.


SMTP ka kaam kaise hota hai:


1. _Email Sending_: Jab aap email bhejte hain (jaise Gmail, Outlook), toh aapka email SMTP ke through server par pahunchta hai.

2. _Server-Server-Communication_: SMTP servers ek dusre se baat karte hain aur email ko recipient ke mail server par pahunchate hain.

3. _Inbox Delivery_: Mail recipient ke server se unke inbox par pahunchta hai (IMAP/POP3 ke through).


Example:


- Aap `abc@gmail.com` se `xyz@yahoo.com` par email bhejte hain.

- Gmail SMTP server email ko receive karta hai aur Yahoo SMTP server par forward karta hai.

- Yahoo mail server email ko recipient ke inbox mein store karta hai.


_Port_: SMTP ke liye do ports use hote hain:


- Port 25: Default port hai, lekin spam ke karan kam use hota hai.

- Port 587: Secure aur commonly use hota hai email bhejne ke liye.


Brief Summary: SMTP sirf email bhejne ke liye use hota hai aur email ko servers ke beech mein transfer karta hai.

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