Premium Inboxes provides managed email infrastructure for agencies, outbound sales teams, and other go-to-market organisations running cold email campaigns. The company supplies officially licensed Google Workspace and Microsoft 365 business inboxes, with services designed to simplify setup and keep outreach operations running. Its team can configure domains and DNS, authenticate SPF, DKIM, and DMARC records, create inboxes, enable warmup, and upload accounts directly to supported sequencing platforms such as Instantly, Smartlead, Apollo, Lemlist, Reply.

io, and Bison. Customers choose an inbox quantity and provider, while Premium Inboxes handles the technical build; the company says many orders are ready in under six hours. Plans are priced per inbox and include setup, with higher-tier options offering features such as 24-hour monitoring, priority support, a dedicated account manager, and a Slack channel.

Premium Inboxes also advertises unlimited replacement inboxes and ongoing infrastructure checks. The service reports more than 2,000 customers, 570,000 inboxes delivered, and a 4. 9 out of 5 Trustpilot rating, and offers an online calculator to estimate inbox needs and costs