send email using telnet

1. Open your command prompt.
2. Now, connect with telnet using the following command:

   telnet example.com 25

3. Type ehlo example.com. Some servers also accept helo in place of ehlo.

   ehlo example.com

4. Type mail from: [e-mail]:

   mail from: [e-mail]

5. Type rcpt to: [e-mail], [e-mail] (replace with your actual recipient name):

   rcpt to: [e-mail], [e-mail]

6. To write the message - type data, followed by your subject and message. To end the message, put a period on a line by itself and press enter:

   dataSubject: My Telnet Test EmailHello,This is an email sent by using the telnet command.Your friend,Me.

7. Type quit to exit telnet.

Sample：

[c:\~]$ telnet 138.35.54.172 25




Connecting to 138.35.54.172:25...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.


220 smtpx.svcs.hpe.com ESMTP Postfix
500 5.5.2 Error: bad syntax


500 5.5.2 Error: bad syntax
ehlo 138.35.54.172
250-smtpx.svcs.hpe.com
250-PIPELINING
250-SIZE 31457280
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from: [e-mail]
250 2.1.0 Ok
rcpt to: [e-mail]
250 2.1.5 Ok
data
502 5.5.2 Error: command not recognized
data
354 End data with <CR><LF>.<CR><LF>
Subject: Test mail
Hellow ord!!!


.
250 2.0.0 Ok: queued as E634075E02CA