Did you enter the correct address of the SMTP server that will be used to send the logs? You may Click on Send Mail Now to verify whether this feature is working or not. What is the hardware revision and firmware version of your router? You can find this by looking at the bottom of the router, and checking the H/W ver: and F/W ver: section of the sticker located there. What I would suggest is upgrading the firmware. What is your public IP address from the Status tab?