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Microsoft 365 Mailboxes for Cold Email

Enterprise-grade Outlook mailboxes for professional outreach. Diversify your infrastructure with Microsoft's trusted email platform.

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Why Microsoft 365 for Cold Email?

Diversifying across email providers is a proven strategy for maintaining deliverability at scale.

Provider Diversification

Running campaigns across both Google and Microsoft improves deliverability by distributing sender reputation risk.

Different IP Pools

Microsoft 365 uses separate IP infrastructure from Gmail, reducing correlation between your sending accounts.

Enterprise Trust

Many B2B recipients use Outlook themselves, and emails from Microsoft infrastructure may see better inbox placement.

Full-Featured Microsoft 365 Mailboxes

Outlook Infrastructure

Enterprise-grade Microsoft email infrastructure trusted by Fortune 500 companies. Diversify your sender reputation across providers.

Automated DNS Setup

SPF, DKIM, and DMARC records configured automatically. Microsoft-specific authentication handled seamlessly.

Instant Provisioning

Mailboxes provisioned within minutes. Full Microsoft 365 Business Basic license with all essential features.

Global Availability

Microsoft's worldwide data center network ensures fast, reliable email delivery to any region.

Sequencer Compatible

Export IMAP/SMTP credentials to Instantly, SmartLead, Saleshandy, and 15+ other platforms instantly.

Enterprise Features at Startup Prices

Each Microsoft 365 mailbox includes the full Business Basic suite, giving you access to Microsoft's productivity tools alongside professional email.

50GB mailbox storage
Outlook web and desktop
OneDrive file storage
Microsoft Teams access
Enterprise security
99.9% uptime guarantee
Advanced threat protection
Mobile Outlook apps

Pricing Overview

Starter
10 included
$3.10
/mailbox/mo
Growth
30 included
$2.75
/mailbox/mo
Pro
100 included
$2.50
/mailbox/mo
See Full Pricing

Google or Microsoft? Why Not Both?

The most successful cold email operations diversify across both providers. StackMail makes it easy to manage both from a single dashboard.

Google

Google Workspace

  • Best-in-class spam filtering
  • Gmail interface familiarity
  • Strong consumer recognition
  • US/EU IP addresses only
Microsoft

Microsoft 365

  • Enterprise trust factor
  • Separate IP infrastructure
  • Outlook integration
  • Global data centers

Mix and match providers to optimize deliverability and reduce risk.

Get started with both

Diversify Your Email Infrastructure Today

Add Microsoft 365 mailboxes to your cold email stack and improve deliverability through provider diversification.

Get Started Free