# apt-get install postfix
# dpkg-reconfigure postfix (if you reconfigure)
The user interface will be displayed. On each screen, select the following values:
Internet Site
mail.example.com
steve
mail.example.com, localhost.localdomain, localhost
No
127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/24
0
+
all
# vi /etc/aliases # edit aliases
alease: your@email.com
# newaliases