Difference Between SMTP and Extended SMTP
Extended SMTP is an extended version of SMTP. Extended SMTP is a set of protocols for sending and receiving electronic messages on the internet. First, Email is sent from sender to sender-server through ESMTP and from sender-server to receiver-server on the internet through ESMTP. ESMTP follows the same protocols as SMTP. It adds more functionality, security, and authentication than SMTP.
Let’s see some basic differences between them.
SMTP | Extended SMTP |
---|---|
Users were not verified in SMTP as a result of massive-scale scam emails being sent. | In Extended SMTP, authentication of the sender is done. |
We cannot attach a Multimedia file in SMTP directly without the help of MMIE. | We can directly attach Multimedia FIle in ESMTP. |
We cannot reduce the size of the email in SMTP. | We can reduce the size of the email in Extended SMTP. |
SMTP clients open transmission with the command HELO. | The main identification feature for ESMTP clients is to open a transmission with the command EHLO (Extended HELLO). |
Simple Mail Transfer Protocol (SMTP)
Email is emerging as one of the most valuable services on the internet today. Most internet systems use SMTP as a method to transfer mail from one user to another. SMTP is a push protocol and is used to send the mail whereas POP (post office protocol) or IMAP (internet message access protocol) is used to retrieve those emails at the receiver’s side.