The 404 page (https://stackoverflow.com/page/not/found) says
If you feel something is missing that should be here, contact us firstname.lastname@example.org
but the team there sent me here. Why?
Suggestion: I would suggest to add the link to https://meta.stackoverflow.com/ on the 404 page, and say, "please consider searching on meta and posting your question there if not found. If you still cannot get satisfaction, then send us a mail at email@example.com."