Buy O365 Email Accounts for Outreach | High Deliverability

Scale Your Cold Email Campaigns with Office 365 Mailboxes at $1

Uptime

0 %

Emails Sent

0 K+

Access premium Microsoft Office 365 inboxes for high- volume cold email campaigns. Perfect for agencies, sales teams, and marketers who need reliable deliverability at scale.

Powerful Features for Cold Email Success

Everything you need to run successful cold email campaigns with real Microsoft Office 365 inboxes

Office 365 Inboxes

Authentic Microsoft Office 365 email accounts with full functionality and enterprise-grade security.

DNS Setup

Comprehensive DNS Setup to optimize your cold email campaigns and improve deliverability.

Automated Setup

Get your inboxes ready in hours with our automated setup process and intelligent configuration.

Advanced Email Warming & Reputation Management

Our intelligent warming system gradually builds your inbox reputation to ensure maximum deliverability from day one.

Smart Warming Algorithm

Automated warming process that mimics natural email patterns

Reputation Monitoring

Continuous monitoring of sender reputation and deliverability metrics

AI-Powered Optimization

Machine learning algorithms optimize send patterns for best results

Warming Progress Dashboard

Inbox Reputation

94%

Domain Authority

87%

Warming Progress

76%

Days Warming

Emails Sent

Transparent Pricing for Every Scale

Choose the perfect plan for your cold email needs. All plans include real Office 365 inboxes with full Microsoft integration.

Starter

Perfect for small teams

$100

per month

Professional

For growing businesses

$200

per month

Enterprise

For Enterprise

$400

per month

Agency

For marketing agencies

Custom

per month

No setup fees • Cancel anytime • sales@coldocean.io

How are we selling Microsoft inboxes so cheap?

At Cold Ocean, we’re able to offer real Microsoft / Outlook inboxes at $1 each because of three core efficiencies in how we source, manage, and deploy accounts:

Bulk enterprise-level procurement

We don’t buy single inboxes. We procure licenses in large enterprise blocks, which brings our per-seat cost down dramatically.

Fully automated provisioning

We built custom automation that: Spins up accounts in seconds, Manages warmup, compliance, security, Routes traffic through US IPs, Keeps accounts healthy without manual overhead. Because our operational cost is extremely low, we pass those savings on.

We run our own US-based infra

We don't resell from intermediaries. We host and manage our own US-based infrastructure that integrates with Microsoft’s tenant systems. This lets us: Avoid reseller markups, Control deliverability, Ensure accounts stay stable and long-lived

Performance Comparison

Inbox Placement Rate

98.7%

vs Industry Average: 85%

Setup Time

24 Hours

vs Industry Average: 3-5 days

Cost Savings

73%

vs Traditional ESP

Perfect for Agencies

Manage multiple client campaigns with dedicated inboxes, white-label reporting, and seamless client onboarding.

High-Volume Ready

Scale to millions of emails per month with our enterprise-grade infrastructure and intelligent load balancing.

United States IP

Send from clean, US-based IPs to boost trust and reduce spam filtering for US audiences.

Seamless Integrations

Connect with your favorite tools and platforms to create a unified cold email workflow

Connect Your Entire Sales Stack

Our platform integrates seamlessly with 100+ popular sales and marketing tools, ensuring your cold email campaigns fit perfectly into your existing workflow.

Smartleads

Automatically connect mailboxes to Smartleads

Instantly

Integrate mailboxes to Instantly

CSV Export of Mailboxes

Import mailboxes in any sending tool

Zapier

Slack

Analytics

Webhooks

Office 365

API

100+

Need a Custom Integration?

Our development team can create custom integrations for your specific workflow requirements.

What Our Customers Say

Join thousands of satisfied customers who’ve transformed their cold email campaigns with our platform

5.0

“Coldocean completely transformed our
agency’s email deliverability. We went
from 60% inbox placement to 98% in just
two weeks. The Office 365 integration is
seamless and the warming process is
incredibly effective.”

Sarah Chen

CEO, Growth Marketing Agency

5.0

“The cost savings are incredible. We’re sending 10x more emails at half the cost of our previous provider. The analytics dashboard gives us insights we never had before. Highly recommended for any serious cold email operation.”

Marcus Rodriguez

VP Sales, TechStart Inc.

5.0

“Setup was incredibly fast – we had 50 inboxes running in under 15 minutes. The support team is responsive and knowledgeable. This platform has become essential to our lead generation strategy.”

Emily Watson

Marketing Director, Scale Solutions

4.9/5

Average Rating

300+

Happy Customers

98.7%

Satisfaction Rate

Frequently Asked Questions

Get answers to common questions about our cold email infrastructure and Office 365 inboxes

Are these real Microsoft Office 365 accounts?

Yes, all our inboxes are genuine Microsoft Office 365 accounts with full functionality, enterprise security, and Microsoft’s reputation backing. Each inbox comes with complete Outlook integration and can be used for cold outreach.

How quickly can I start sending emails?

Our automated setup process typically takes 5-10 minutes. However, we recommend a 7-14 day warming period for optimal deliverability. During this time, the system gradually increases send volume to build your reputation.

What's your deliverability rate?

Our customers typically achieve 95-99% inbox placement rates. This is significantly higher than industry averages due to our Microsoft infrastructure, proper warming protocols, and advanced reputation management systems.

Can I use my own custom domains?

Absolutely! We support custom domain configuration for Professional plans and above. Our team will help you set up proper DNS records, SPF, DKIM, and DMARC authentication to ensure maximum deliverability with your branded domains.

What integrations do you support?

We integrate with popular tools including Smartleads, Instantly, Email Bison, CSV and more. We also provide a comprehensive export for custom integration. Our development team can create custom integrations for enterprise clients.

Is there a money-back guarantee?

Yes, we offer a 30-day money-back guarantee on all plans. If you’re not satisfied with our service for any reason, we’ll provide a full refund. We also offer a 14-day free trial so you can test our platform risk-free.

How do you ensure compliance with anti-spam laws?

We provide built-in compliance tools for CAN-SPAM, GDPR, and other regulations. This includes automatic unsubscribe handling, consent tracking, and compliance reporting. Our platform also includes content scanning to help you avoid spam triggers.

Ready to Scale Your Cold Email Campaigns?

Get started with your free trial today and experience the power of real Office 365 inboxes

Book Demo

Cancel anytime

Quick Setup

Get your first campaign running in under 10 minutes with our automated onboarding process.

Expert Support

Our team of cold email experts will help optimize your campaigns for maximum deliverability.

Instant Results

See immediate improvements in your inbox placement rates and campaign performance.

Need Enterprise Solutions?

Contact our sales team for custom pricing and enterprise features.