email notification is sent from odd address

I just received an email with a chat message where I was @mentioned (see applications/hubl#669 (closed) for details of that).

The From: address of that email is virtual-assembly@alwaysdata.net - that is confusing and I expect could in some organizations easily land in a spam folder.

I would expect emails for virtual-assembly.hubl.world to originate from a host below hubl.world.