Someone

bash-3.1# /var/qmail/bin/qmail-smtpd 
220 lab.ebuilder.cl ESMTP SPF1
helo mail
250 lab.ebuilder.cl
mail from: lala@ebuilder.cl
550 sorry, your mailbox must exist
quit
221 lab.ebuilder.cl

bash-3.1# /etc/rc.d/qmail start
Starting qmailsend.
Starting qmailsmtpd.
Starting qmailpop3d.

bash-3.1# telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to lab.
Escape character is '^]'.
220 lab.ebuilder.cl ESMTP SPF1
mail from: lala@ebuilder.cl
250 ok
quit
221 lab.ebuilder.cl
Connection closed by foreign host.
bash-3.1#