No email client? Use telnet to send and receive emails!

Telnet to port 25 of the server to send emails using the SMTP service of the server.
Below is what I tested at the company Code In bold.

Telnet mail.lypower.com.cn
220 mail.lypower.com.cn Microsoft ESMTP mail service, version: 6.0.20.0.3959 ready at Fri, 9 May 2008 10:51:50 + 0800

Helo
250 mail.lypower.com.cn Hello [192.168.50.8]

Mail from: xuminghui@lypower.com.cn
250 2.1.0 xuminghui@lypower.com.cn... sender OK

Rcpt to: xuminghui@lypower.com.cn
250 2.1.5 xuminghui@lypower.com.cn

Data
354 start mail input; end with <CRLF>. <CRLF>
Hello, xuminghui.
This email is from the telnet port 25.
The command line is:
Helo
Mail from: xuminghui@lypower.com.cn
Rcpt to: xuminghui@lypower.com.cn
Data
-- Here input the message --
OK. The end.
Send by pangpang, xuminghui, haha
Over

.
250 2.6.0 <MAILTWpSewau9E3RCmR00000001@mail.lypower.com.cn> queued mail for delivery