Psalms 20

[诗20:14] 耶和华 – 我的磐石，我的救赎主啊，愿我口中的言语，心里的意念在你面前蒙悦纳。

How to speak simple SMTP

telnet smtp.myost.com 25
HELO
MAIL FROM: singchyun@yadah.com
RCPT TO: myfriend@somewhereelse.com
DATA
Hello friend,

Would u want dinner tonight?

.
QUIT

How to start sendmail daemon

/usr/sbin/sendmail -bd -q20m

Source: http://www.feep.net/sendmail/tutorial/run/starting.html