gandalf@Hellscream:~$ echo test | mail -s "test" root

Jul 21 13:43:30 REXXAR postfix/smtpd[15451]: connect from cups.local[10.0.0.2]
Jul 21 13:43:30 REXXAR postfix/smtpd[15451]: 7B023749: client=cups.local[10.0.0.2]
Jul 21 13:43:30 REXXAR postfix/cleanup[15457]: 7B023749: message-id=<20050721114503.84EB6960@localhost.localdomain>
Jul 21 13:43:30 REXXAR postfix/qmgr[15411]: 7B023749: from=<gandalf@le-vert.net>, size=489, nrcpt=1 (queue active)
Jul 21 13:43:30 REXXAR postfix/smtpd[15451]: disconnect from cups.local[10.0.0.2]
Jul 21 13:43:30 REXXAR postfix/qmgr[15411]: 7B023749: to=<root@le-vert.net>, relay=none, delay=0, status=deferred (delivery temporarily suspended: connect to le-vert.net[81.56.196.209]: Connection refused)

# See /usr/share/postfix/main.cf.dist for a commented, more complete version
 
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
 
# appending .domain is the MUA's job.
append_dot_mydomain = no
 
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
 
myhostname = mail.le-vert.net
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination =
relayhost =
mailbox_size_limit =
recipient_delimiter =
inet_interfaces = all
mailbox_command = procmail -a "$EXTENSION"
smptd_recipient_restrictions =  permit_mynetworks