You can now add domains you already own and have Ken create inboxes on them. Go to Delivery › Inboxes, open New Inbox and pick Bring existing domain.

The Add your domains wizard has five steps: Capacity, Domains, Settings, Inboxes and Nameservers. Paste your domain names, and Ken warns you about any that already receive email or have a live website. Nothing is added until you press Add domains.

Ken then lists the nameservers to set at your registrar, each with a copy button. You keep ownership and Ken hosts the DNS. If the nameservers still do not match after 24 hours, Ken emails you.

The wizard closes only with its X, so a stray click does not lose your work. It needs a paid plan and edit access to Delivery.

Also new: an inbox's Settings has Upload photo for its sender picture and an editable Daily send limit.