Cold Email Inboxes Built to Deliver.
Google. Microsoft. AWS SMTP. Developer Tools.
Out-of-stealth pricing from $2.25/mo, US-based infrastructure, real human support, and MCP-ready developer tools for Codex and Claude.
Why SimpleInboxes? Cold Email Infrastructure Built Right
Everything you need to run cold email at scale — without the headaches.
Every Provider, One Dashboard
AWS SMTP, Microsoft 365, Google Workspace, and US-based Azure IPs all under one roof. Mix and match providers on the same order, managed from a single account — no more juggling vendors.
Land in the Inbox, Not in Spam
Isolated tenants on US-based Azure IPs and Google Workspace infrastructure mean your emails reach real inboxes — not spam folders. Your sending reputation stays clean, always.
Pay Less, Get More — No Minimums
Competitors charge more and force you into bundles. During launch, Microsoft is $2.25, Google is $2.50, and there is no minimum order.
Dedicated Account Manager — on WhatsApp
No ticket queues. No chatbots. Every customer gets a dedicated account manager on WhatsApp — whether you have 3 inboxes or 300.
Developer API + MCP for Codex
Manage inbox operations from code or chat. Use the REST API for your scripts, or connect MCP to Codex, Claude, Slack, Telegram, and internal tools for DNS checks, order previews, retries, and warmup changes.
Bring Burned Domains Back to Life
Only SimpleInboxes does this. When a sending domain burns its reputation, park it in our Recovery Pool. Our recovery infrastructure heals it back to clean — then reactivate with one click when the health light turns green. No competitor offers this.
Google Workspace is $2.50/mo (24% off) · No credit card to sign up
Bring Burned Domains Back to Life
Every other provider tells you to throw burned domains away and buy new ones. We don't. Park a burned domain in our Recovery Pool and our recovery infrastructure heals its sender reputation. A health light tracks recovery — green means ready. Reactivate with one click and we re-provision inboxes on the healed domain. No competitor offers this.
- Heal burned domains instead of throwing them away
- Color-coded health lights — green means ready to reactivate
- One-click reactivation re-provisions inboxes automatically
The Best Deliverability Starts in the US
After analyzing deliverability across millions of cold emails, the data is clear — US-routed IPs consistently outperform APAC, EU, and shared offshore infrastructure. That's why every AWS SMTP, Microsoft 365, and Google Workspace inbox you send through SimpleInboxes routes exclusively through isolated, US-based tenants. No offshore routing. No shared servers. Just the cleanest IPs available.
- US-only IP routing — no APAC, EU, or offshore infrastructure
- Isolated tenants protect your sender reputation from other users
- 98.7% average inbox placement across millions of emails sent
The Best Deliverability Starts in the US
After analyzing deliverability across millions of cold emails, the data is clear — US-routed IPs consistently outperform APAC, EU, and shared offshore infrastructure. That's why every AWS SMTP, Microsoft 365, and Google Workspace inbox you send through SimpleInboxes routes exclusively through isolated, US-based tenants. No offshore routing. No shared servers. Just the cleanest IPs available.
- US-only IP routing — no APAC, EU, or offshore infrastructure
- Isolated tenants protect your sender reputation from other users
- 98.7% average inbox placement across millions of emails sent
Out-of-Stealth Pricing That Actually Scales.
Competitors charge more per inbox and often make you buy a bundle first. During launch, SimpleInboxes starts at $2.25 for Microsoft and $2.50 for Google, with zero minimums.
- No minimum order — buy 1 inbox or 1,000
- $2.25/inbox (Microsoft) · $2.50/inbox (Google) out-of-stealth pricing
- Flat pricing stays simple at every order size
Dedicated Account Manager — On WhatsApp
No ticket queues. No chatbots. Every customer gets a dedicated account manager on WhatsApp — whether you have 1 inbox or 1,000. Every issue is handled by a real human with response times under an hour.
- Dedicated account manager for every customer, at every plan
- Real humans on every message — no bots, no canned responses
- Response times under an hour, resolutions same day
Ditch the Spreadsheets. Order in Minutes.
No more copy-pasting into Google Sheets or chasing email threads. Pick your provider, enter a domain, name your inboxes, connect your sending tool, and check out — all from one clean interface. Most orders take under five minutes.
- Microsoft or Google — choose your provider in one click
- Name inboxes, connect your sending tool, and check out in minutes
- No spreadsheets, no back-and-forth — just a simple web app
Let Codex or Claude Manage Your Inbox Ops
SimpleInboxes now has a developer layer for teams that want infrastructure to move through code or chat. Use the REST API for scripts, or connect the MCP endpoint to Codex, Claude, and internal chat workflows so your team can check DNS, preview orders, retry failed steps, and manage warmup without living in dashboards.
- REST API for orders, domains, workspaces, wallet data, and DNS checks
- MCP endpoint for Codex, Claude, and agent-driven inbox operations
- Built for Slack, Telegram, and internal chat workflows through your own automation
One Dashboard. Every Client. Zero Chaos.
Stop juggling logins and spreadsheets. Agency Mode gives each client their own isolated workspace with separate billing, domains, and controls — all managed from a single dashboard. See spend across every client at a glance, bulk-rename inboxes when reps change, and cancel entire workspaces in one click when clients churn.
- Isolated workspaces — per-client domains, billing, and credit cards
- Bulk rename, bulk cancel, and bulk DNS across hundreds of inboxes
- Real-time spend breakdown across every client from one view
See How We Stack Up
Compare the key differences across SimpleInboxes, InboxKit, and ZapMail — including the Domain Recovery Pool no other provider offers.
Google Workspace is $2.50/mo (24% off) · No credit card to sign up
Or switch & pay — set up in 1 minute, no minimums →Works With Your Sending Tools
Upload your inboxes to any major cold email platform in seconds.
Plug into your sending tool in under 5 minutes
Or sign up and connect your tools →Cold Email Inbox Pricing — Simple & Transparent
Three providers. No hidden fees. No contracts.
Microsoft is $2.25/inbox/mo, Google is $2.50/inbox/mo, and AWS SMTP is $1.00/inbox/mo.
AWS SMTP
Flat rate — same at any volume
- AWS Private IPs
- Best bang for buck
- Cheapest per send
- IMAP/SMTP access
- Connected to your sending tool
Microsoft 365
Flat rate — same at any volume
- Tier-1 US-based Outlook IPs
- Done-for-you DNS setup
- Native Outlook access
- Isolated admin tenants
- IMAP/SMTP access
- Connected to your sending tool
Google Workspace
Flat rate — same at any volume
- Google Workspace infrastructure
- Done-for-you DNS setup
- Native Gmail access
- Google admin console
- IMAP/SMTP access
- Connected to your sending tool
Out-of-stealth pricing stays simple for every order size. No minimums, no contracts, no hidden feature gates.
All plans include: Done-for-you DNS · Dedicated account manager · Developer API + MCP · Self-service dashboard
No credit card required. Cancel anytime.
Frequently Asked Questions About Cold Email Inboxes
Still have questions?
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Get in Touch
Questions? We're here to help.
Out-of-Stealth Pricing for Serious Cold Email Teams
Start with Microsoft at $2.25/mo, Google at $2.50/mo, and human support that can actually help when infrastructure needs attention.
No credit card needed to create an account.