Inbox Kit

InboxKit is your all-in-one platform for building, managing, and scaling cold-email infrastructure. It automates everything from domain provisioning and DNS setup to mailbox creation, warm-up, and sequencer integrations, so you can focus on running high-performing outbound campaigns — not managing the tech stack behind them. With InboxKit, you can: Buy or connect domains instantly — DNS (SPF, DKIM, DMARC, MX) configured automatically in the backend. Create Google Workspace or Microsoft 365 mailboxes without manual setup. Warm up your inboxes automatically to build reputation and improve deliverability. Export mailboxes directly to outreach tools like Smartlead and Instantly with one click. Monitor deliverability health through a single unified dashboard. 💡 In short: InboxKit gives you production-ready domains and mailboxes in minutes — with zero technical setup.