EFS or Email Forwarding System is a free windows application which allows you to forward emails which you receive on your domain account to local SMTP server which is running to accept mail from your domain. This is pretty useful if you had set up an email where all mails are sent and dont want to use the boring Mail Software provided by the ISP.
- Rules based forwarding based on subject, email address etc.
- Allows you to schedule if you dont stay connected to internet all the time.
- If you have Firewall configure EFS can work according to that.
- You can control the SPAM by checking few things in header like no recipients found, to, cc etc. This is powerful feature and only advance users should configure it.
Read more on What is EFS and situations where you would want to use it.