Hi @andrewchen ,
Your invitation to join the forum was caught by the spam filter. I only found the invitation because I happened to need to find something from my spam box.
Having the email to come from 'email@example.com' just looked super sus. Plus the invitation looked pretty generic. I almost thought this was a password phishing scam.
I imagine many other people that you have invited might experience the same thing. Either never see it because it is in spam box, or saw it but dismiss it as a phishing attempt.