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FrostMailer

Vendor: FrostMailer

FrostMailer provides cold email mailboxes on Microsoft Azure (from €0.30) and Google Workspace (from €2.50) with automated DNS configuration, warm-up, and API/MCP/Slack provisioning for agencies scaling outreach.

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email Agencies and sales teams scaling cold email outreach campaigns Teams needing automated mailbox provisioning via API/MCP/Slack Organizations requiring pre-warmed mailboxes for immediate outreach #cold-email #email-infrastructure #deliverability #mailbox-management #azure-mailboxes #google-workspace #api-provisioning #mcp-integration

Overview

FrostMailer is a cold email infrastructure platform that provisions Microsoft Azure and Google Workspace mailboxes for agencies and sales teams. Azure mailboxes start at €0.30/account with .com domain included, while Google Workspace full admin access starts at €2.50/account (domain not included). The platform automates SPF, DKIM, and DMARC configuration, delivers mailboxes live within 24 hours, and includes warm-up periods (2 weeks for Azure, 4+ weeks pre-warmed for Google at scale). Volume pricing tiers exist for 250+, 500+ accounts with increasing discounts. Unique provisioning options include API, MCP, Claude Code, and Slack integration. The service maintains a 4.6/5 Trustpilot rating with verified client testimonials highlighting deliverability results and responsive support.

Key Features

Automated Mailbox Provisioning

Instantly generates and configures multiple email accounts for cold email outreach campaigns via web UI, API, MCP, Claude Code, or Slack.

SPF, DKIM, and DMARC Setup

Automatically configures DNS records to authenticate domains, improve deliverability, and protect sender reputation.

Microsoft Azure Mailboxes

Azure mailboxes from €0.30/account with .com domain included, US IP accounts, 2-3 sends per inbox per day, 2-week warm-up, sold in tenants of 25/50/100 accounts.

Google Workspace Full Admin Mailboxes

Google Workspace with full admin access from €2.50/account (domain not included), US IP accounts, up to 15 sends/day under 250 accounts, 4+ weeks pre-warmed at scale tiers.

Volume Pricing Tiers

Tiered pricing for 250-499 and 500+ accounts with cheaper per-inbox rates, ready in ~6 hours, skip warm-up window at highest tier.

API, MCP, and Slack Provisioning

Provision mailboxes programmatically via API, MCP, Claude Code, or Slack for automated infrastructure management.

Responsive Support

Offers personalized assistance via Slack for setup, scaling, and troubleshooting email infrastructure issues.

Pros & Strengths

  • ✓
    Simplified Setup Process: Automates complex tasks like DNS configuration and mailbox creation, reducing technical overhead for users.
  • ✓
    High Deliverability Rates: Built-in authentication, pre-warmed mailboxes, and optional dedicated IPs help maintain strong sender reputation and inbox placement.
  • ✓
    Flexible Provisioning Options: Unique API, MCP, Claude Code, and Slack integration allows programmatic mailbox provisioning from terminals and workflows.
  • ✓
    Transparent Volume Pricing: Clear tiered pricing for Azure and Google mailboxes with decreasing per-account costs at scale.

Cons & Tradeoffs

  • ⚠
    Pricing Transparency for Larger Setups: Pricing details for scaling beyond initial tiers may not be fully transparent or competitive for enterprise volumes.
  • ⚠
    Domain Not Included with Google Workspace: Google Workspace full admin mailboxes do not include a domain, unlike Azure mailboxes which include .com domains.
  • ⚠
    Minimum Order Requirements: Minimum order of 3 accounts required, and Azure mailboxes sold in tenants of 25/50/100 accounts.

Known Limitations

  • • Pricing model may become costly for teams requiring hundreds or thousands of sending accounts.
  • • Google Workspace mailboxes require separate domain purchase.
  • • Azure mailboxes limited to 2-3 sends per inbox per day during warm-up.
  • • Minimum order quantities may not suit very small teams or testing scenarios.

Pricing & Plans

Model: usage
EUR0.3 /month

Azure mailboxes from €0.30/account/month with .com domain included (sold in tenants of 25/50/100). Google Workspace full admin from €2.50/account/month (domain not included). Volume discounts at 250-499 and 500+ accounts. Minimum 3 accounts. Billed monthly in Euros.

✓ Free Plan ✓ Free Trial

Pricing verified: 2026-08-20

Editorial Info

Last Reviewed: 2026-08-20

Verified Sources & Research

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