How should I setup with www. domain?

[pfaffman (Jay Pfaffman)]

@Alex_P

hm, I thought www. is technically the same subdomain as forum. ?

No. They are . . . different.

I recommend that you configure mailgun to send from www.x.com so that if you decide that you want to do something with mail and x.com in the future it won’t be complicated by it sharing the domain with Discourse.

@Alex_P

(and example.com redirects to www.)

See https://www.forcewww.com/