I've worked through the first few videos, can't wait to get stuck into this.🙌 Questions about inboxes / domains to understand how many are needed and the cost. 1 domain supports 3 inboxes? You can send 30 - 50 emails per day, per inbox. So for 50 inboxes: 17 domains This enables upto 1500 emails to be sent per day. 17 domains @ £13 each (£221) - Is this per year? Billed through emailscale? Does Emailscale will handle DMARC / DKIM / SPF for domains? Thanks!