DO. NOT. SIGN. UP!
Horrible service. Stopped working after I bought a premium subscription. Most of my emails started being dropped instead of being forwarded. I tried to contact support on 10 different emails over 2 months, never got a reply. I even tried to reach out to the owner on Reddit and Twitter, no response there either. Whoever is running this service has either died (and the hosting bills are still paid for) or they don't give a crap about their customers. Either way, STAY AWAY!