OXYGEN Email Infrastructure

Own the sending substrate beneath Messages and Sequences. Discover with oxygen capabilities search "email infrastructure <goal>" --json; families: domains, managed-inboxes, mailboxes, deliverability, egress, integrations, senders. Onboarding/import language routes straight to mailboxes compatibility|import|connect-oauth|oauth-health; selected-mailbox removal routes to the preview-first mailboxes delete contract.

Readiness chain