Following trends of my previous posts Differences IPv4 Vs IPv6,Differences Routing Vs Routed protocol and Load Testing Vs Stress Testing, below is another one for differences SMTP Vs ESMTP.
SMTP
|
ESMTP
|
| Stands for Simple Mail Transfer Protocol | Stands for Extended Simple Mail Transfer Protocol |
| First command in SMTP session: HELO techsutram.com | First command in ESMTP session: EHLO techsutram.com |
| RFC 821 | RFC 1869 |
| SMTP ‘MAIL FROM’ and “RCPT TO’ allows size only of 512 characters including | ESMTP ‘MAIL FROM’ and “RCPT TO’ allows size greater than 512 characters. |
| SMTP alone cannot be extended with new commands. | ESMTP is framework that enhances capability to extend existing SMTP commands |
If you are aware of any improvements to above differences or want to add to the above list then please post your comments below.
REFERENCES
http://www.techsutram.com/2010/03/smtp-vs-esmtp.html
