Smarter Cold Email Infra for
Modern Outreach
Automated mailbox creation, DNS setup, and outreach tool connection — all in under 5 minutes. One secure platform built for modern cold email teams.
Coldmails.ai is a cold email infrastructure platform that provides businesses with US-hosted Google Workspace and Microsoft 365 mailboxes optimized for inbox deliverability. Unlike traditional SMTP relays or reseller accounts, Coldmails.ai offers official Business Starter accounts with full admin access, one domain per workspace isolation, and automated SPF/DKIM/DMARC configuration.
This is where we stand.
It's only the beginning of the journey, but we're proud of how far we've come.
As of 2026, Coldmails.ai has provisioned over 122,000 mailboxes across 50,000+ domains, with an average setup time of 5 minutes. Trusted by 2,000+ businesses worldwide for cold email infrastructure.
Skip the Warmup. Start Sending from Day One.
No more waiting weeks to warm up mailboxes. Coldmails.ai gives you pre-warmed, high-deliverability Google & Microsoft accounts — ready to plug into your campaigns instantly.
Get Pre-warmed MailboxesWorkspace-Level Isolation
One domain per workspace with admin access, for unmatched deliverability. Full isolation means your sender reputation stays protected.
Built for Scale. Packed with Power
Buy/Connect domains, auto-generate mailbox names, choose your outreach platform — and you're done.
Flexible Domain Options
Bring your own or purchase new domains — fully supported with instant verification.
Advanced Domain Management
Manage DNS records, set up forwarding, and domain masking — at scale.
50+ Outreach Tool Integrations
Export mailboxes to Instantly, Smartlead, ReachInbox, Reply, Lemlist, and more — seamlessly.
Automated DNS Configuration
SPF, DKIM, DMARC, and custom tracking domains set up instantly. Zero manual work.
Multi-Workspace Management
Easily manage separate workspaces for clients or campaigns with full isolation.
Integrates with your favorite tools
Supercharge Your Workflow with AI
Instant Domain Genie
Spin up brand-ready, SEO-smart domain names in seconds — drop a keyword and let AI shortlist winners that are actually available.
Smart Mailbox Namer
Auto-craft professional, on-brand mailbox handles that align with your domain and team structure — no more awkward email IDs.
Persona Snapshots
Generate studio-quality profile images that match your brand's vibe with one click, perfect for sites, CRMs, and signatures.
Why Teams Choose Coldmails.ai
Own Domains, Create Mailboxes, Connect Platforms — All in One Place
| Feature | SMTP Mailboxes | Google/MS Resellers | Coldmails.ai |
|---|---|---|---|
| Setup Time | ~30 mins | Up to 48 hours | 10 mins (fully automated) |
| Connection | SMTP/IMAP (no native) | App passwords (manual) | OAuth (fully automated) |
| Mailbox Type | SMTP relays | Legacy/educational accounts | Official Business Starter + Admin |
| Deliverability | Okay | Poor | High (US IPs + clean domains) |
| Domain Setup | Shared IPs | Shared admin access | 1 Domain per workspace |
| Ban Risk | Medium | High | Very Low |
Coldmails.ai API: Headless Email Infrastructure for SaaS & AI SDRs
From mailbox provisioning to deliverability insights — run everything programmatically. Power your platform with our infrastructure.
Loved by Thousands
“Coldmails.ai cut our mailbox setup time from days to minutes. Our deliverability rates jumped 40% in the first month.”
“We switched from another provider and immediately saw better inbox placement. The pre-warmed mailboxes are a game-changer.”
“Managing 500+ mailboxes across 15 clients used to be a nightmare. Coldmails.ai makes it effortless with workspace isolation.”
“The automated DNS setup alone saves us hours every week. SPF, DKIM, DMARC — all handled automatically.”
“Best email infrastructure platform we've used. The API integration with our tool was seamless and the support team is incredible.”
“We've tried every provider out there. Coldmails.ai is the only one that delivers consistent inbox placement at scale.”
“Coldmails.ai cut our mailbox setup time from days to minutes. Our deliverability rates jumped 40% in the first month.”
“We switched from another provider and immediately saw better inbox placement. The pre-warmed mailboxes are a game-changer.”
“Managing 500+ mailboxes across 15 clients used to be a nightmare. Coldmails.ai makes it effortless with workspace isolation.”
“The automated DNS setup alone saves us hours every week. SPF, DKIM, DMARC — all handled automatically.”
“Best email infrastructure platform we've used. The API integration with our tool was seamless and the support team is incredible.”
“We've tried every provider out there. Coldmails.ai is the only one that delivers consistent inbox placement at scale.”
Flexible Pricing Plans
Choose the perfect plan for your email outreach needs. Get started with Google Workspace or Microsoft 365 mailboxes optimized for deliverability.
Starter
Growth
Pro
All plans include
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Questions & Answers
We have answers to your questions about our services and approach.
Cold Email Infrastructure That Delivers. Literally.
Coldmails.ai gets your emails to the inbox, not spam folders. Start scaling your outreach today.
Get Started