How do you setup the POP3 anti spam filtering on RF600VPN?

There is a POP3 spam filter option in Proxy setup. You need to enable the following:

1) check POP3 spam protection

2) check for check for NULL sender

3) bad pattern in Sender/Recipient address, put in the following:
*%*
*@[0-9]*.com
*@[0-9]*.net

4) enable message filtering

5) add any file attachments, subject and expression that you want to filter