Emails don't arrive to my inbox

Hi. Just figured out people have sent me emails, but they aren’t in either my inbox or my spam folder. Not sure how many have been lost. Is there a way I can fix this? I checked the email address and it’s mine.

I’m not sure if this is the proper etiquette to ditto on the same problem, but yeah, same here. Please correct me if I’m wrong.

I also just realized some forum emails I had previously been receiving isn’t coming to me anymore. I’ve double checked my notification settings (to receive email), they have not changed.