No longer receiving email from specific website
After restarting my computer yesterday, I am no longer receiving emails from one website I got emails from without a problem before. Because the email I need from this website is a two-step authorization code, this means I can't sign into my account. I've tried restarting again, as well as using a different browser but neither helped and I don't really know where to go from here. The website is forums.spacebattles.com and the email is email@example.com
If anyone knows how to fix this I would be immensely grateful. Thanks.