Buffer Hi Buffer, for 500 users and up, I would recommend to do the hosting yourself.
davids2 Can you contact info@freeflarum.com? Most likely, the confirmation mail was filtered by your provider, you made a typo or it ended up in your spam folder.
yannis Have you entered your custom domain in the FreeFlarum settings? That is required to make it work.
rehitu Uploading images is not supported by FreeFlarum but you can use the Imgur Upload extension. Embedded images are supported, use Fof Formatting for that.