Draytek VigorPro 5500 Series - Manual (Page 201)

VigorPro5500 Series User’s Guide 193
(Above figure supposes you have not activated Anti-Virus yet.)
9. Click Close.
Now, you have finished all the procedure for activating Anti-Spam service for your router.
Note: You are allowed to use this version (with anti-spam features) for 30 days
after registration for your router. In addition, you will be informed with an e-mail
before the expiry of this version.