Thanks @julian! The code is a bit daunting and I don't want to risk breaking anything at the moment. Is there any other way for me to change the og:image meta property? I tried adjusting my logo size but, that just made my logo smaller because of NodeBB's resizing in the header.
We do throttle the confirmation emails, but when you switch your email, you are automatically sent another confirmation email, so that's why you can't send it again manually... I remember someone made an issue about this recently too.