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Frostmailer

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Frostmailer is cold email infrastructure for agencies and B2B teams, built to send up to 10,000 emails a day from inboxes set up to land in the inbox, not spam. We set up the sending side so you can focus on the campaign. What we offer: Microsoft Azure inboxes: €30 a month per tenant, with a .com domain included and 25, 50 or 100 inboxes. SPF, DKIM and DMARC are set up for you, and warm-up runs for two weeks. Google Workspace full admin inboxes: from €2.50 per inbox. You bring your own domain. Pre-warmed inboxes: Azure and Google inboxes that have already had 4 weeks of warm-up, ready to send on day one. Build and Release: our done-for-you service. We build the infrastructure, write the copy, set up the campaign and supply the first month of leads, then hand it over to you. API and MCP: order and manage inboxes from your own tools, Claude Code or Cursor. Inboxes connect to EmailBison, Smartlead, Instantly, PlusVibe, Success.ai and MasterInbox, and are delivered in 10 to 24 hours.

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