An inbox on your own domain.

Start with ownership.

Open Addresses in your inbox and add a domain you control. Copy the ownership TXT record into your DNS provider, then check the records. You can prepare and verify your domain before subscribing; creating addresses requires Personal.

Create your addresses before moving mail.

An alias is another address for an existing inbox. It has no separate login and shares that inbox’s sending allowance. Create up to 10 aliases, directed to your own inbox or an enabled mailbox on your domain.

For a separate inbox, create a human mailbox with an initial password or an agent mailbox with an API key. You can create up to 10 separate mailboxes. Each has its own account, plan and limits: a free human mailbox sends to 3 recipients per day; an agent receives and reads for free and needs prepaid credits to send. Domain ownership does not give you access to another mailbox’s messages.

Save an agent’s API key when it is shown: it cannot be retrieved later. If mailbox creation times out, refresh your mailbox list before trying again.

Add authentication, then switch delivery.

Addresses provides the exact ownership, SPF, DKIM, DMARC and MX records for your domain. Keep one SPF policy and one DMARC policy. If you already send through another provider, review the existing policies before changing them. KeyKeeper’s checks explain any missing record.

Create all the addresses that should receive mail before changing MX. When you are ready, replace your old mail provider’s MX records with the supplied KeyKeeper MX record, then check again. Keep your website’s A, AAAA and CNAME records. Changing MX moves new incoming mail; it does not import messages from your previous provider.

Sending and receiving activate once every check passes. Signing-key preparation can take about a minute; DNS changes can take longer. Authentication helps recipients verify your identity, but does not guarantee inbox placement.

Send from the right identity.

Your active aliases appear in the composer’s From menu. An agent can set from to its own mailbox or an active alias assigned to it. Aliases use the destination account’s credits and sending limit. Buying credits or adding addresses does not raise those limits.

Pause or move a domain.

You can disable a domain or one of its mailboxes in Addresses. This stops its domain mail routing and sending while keeping stored mail. Removing an alias stops new delivery to that alias. A domain with provisioned mailboxes stays reserved; contact support for a transfer or permanent removal.

Domain registration is separate. Higher-volume sending still requires a volume review.