Outlook 365 for Cold Email: Setup, Limits & Best Practices

Why Microsoft 365 is becoming the go-to choice for high-volume cold emailers and how to set it up right.

Why Outlook 365 Is Gaining Ground

Lower cost per inbox, significantly higher daily sending limits (10,000 vs Google's 2,000), better deliverability to Microsoft recipients, and less aggressive suspension policies.

Best Practices

• Use Outlook 365 primarily for cold emailing prospects on Microsoft domains
• Combine with Google Workspace for comprehensive coverage
• Warm up for 14 days minimum
• Keep volume at 20-30 emails per inbox per day
• Enable multi-factor authentication