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What are the safe sending limits for cold email?

April 2026

Quick Answer

**Conservative limits (community consensus):** **Google Workspace:** - Per inbox daily: 15-20 emails - Warmup period: 28-35 days - Ramp schedule: - Week 1: 5/day - Week 2: 10/day - Week 3: 15/day - Week 4: 20/day **Microsoft 365:** - Per inbox daily: 10-15 emails - Warmup period: 35-42 days - Ramp schedule: - Week 1: 3/day - Week 2: 5/day - Week 3: 10/day - Week 4-5: 15/day **Safety rules:** - Never exceed 25/day per inbox regardless of warmup - Use ESP matching (Google to Google, MS to MS) - Plain text only, no images in first email - No links in first email - Use custom tr

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1 months ago

1 Answer

Conservative limits (community consensus):

Google Workspace:

  • Per inbox daily: 15-20 emails
  • Warmup period: 28-35 days
  • Ramp schedule:
    • Week 1: 5/day
    • Week 2: 10/day
    • Week 3: 15/day
    • Week 4: 20/day

Microsoft 365:

  • Per inbox daily: 10-15 emails
  • Warmup period: 35-42 days
  • Ramp schedule:
    • Week 1: 3/day
    • Week 2: 5/day
    • Week 3: 10/day
    • Week 4-5: 15/day

Safety rules:

  • Never exceed 25/day per inbox regardless of warmup
  • Use ESP matching (Google to Google, MS to MS)
  • Plain text only, no images in first email
  • No links in first email
  • Use custom tracking domain

Example setup for 200 emails/day:

  • 10 Google inboxes × 15/day = 150
  • 5 Microsoft inboxes × 10/day = 50
  • Total: 200/day
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