how to setup smarthost
======================

prerequisite: SASL authentication should be enabled first


1. changes 
   (sudo nano /etc/postfix/main.cf)


   relayhost = [smtpauth.earthlink.net]
   smtp_sasl_auth_enable = yes
   smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
   smtp_sasl_security_options =



2. Create the password maps file 
   (sudo nano /etc/postfix/sasl_password) with one line as below
 
   smtpauth.earthlink.net shaojunlei@earthlink.net:password


3. Set proper permissions for the password maps file    

   sudo chown root:root /etc/postfix/sasl_password 
   sudo chmod 600 /etc/postfix/sasl_password  


4. Create hash from maps file 
   (remember to do it each time you change your maps file):

   sudo postmap hash:/etc/postfix/sasl_password



5. Restart postfix

   sudo /etc/init.d/postfix restart


6. test 


    a) check 

       saslfinger -c


    b) send msg
      
      date | mail -s “testing” rlei7777777@gmail.com


    c) monitor

      tail -f /var/log/mail.log