Thanks to Lyosha for mentioning this and Lucius for helping with the answer. The mail does end up in the spam folder for some people and there's not much I can do about this until we get a domain + host + mailserver. All the funds from donations are being saved up to purchase the Unity Pro license, and everything beyond that will go to hosting and other improvements for the project. We're not too far from a license btw, thanks again to all our supporters, you know who you are...