Inframail

Inframail offers unlimited cold email inboxes backed by Microsoft's cloud, hosted on your own domains with dedicated US IP addresses. Instead of paying per mailbox, you pay a flat monthly rate based on sending volume, which suits teams that want lots of inboxes.

Setup is automated: SPF, DKIM and DMARC are configured in seconds, and you can buy domains through Inframail or bring existing ones for a small one-time setup fee. New sign-ups get ten free .com domains. Inframail works with Instantly, Smartlead, Woodpecker, Saleshandy, ReachInbox and Salesforge, so the inboxes drop into the sequencer you already use. A done-for-you setup service is available for teams that want it handled.

Inframail is a good fit for agencies and outbound teams that want to scale inbox counts without per-seat or per-mailbox costs.

The Unlimited plan costs $147 a month for up to 80,000 emails a month, and the Agency Pack is $387 a month for 300,000 emails, with no per-email fees. Done-for-you setup costs $3,497 one-time or $499 a month.