Sending all your cold emails from one inbox is risky. Here's why rotation matters.

The Problem with Single Inbox

  • Daily sending limits (Google caps at ~500/day)
  • One spam complaint affects all your email
  • If blacklisted, you're dead in the water
  • No redundancy if account gets suspended

The Solution: Inbox Rotation

Spread your sending across multiple inboxes:

  • Higher total daily volume
  • Risk distributed across accounts
  • Better deliverability per message
  • Redundancy if one account has issues

How to Set It Up

Option 1: Multiple accounts on your main domain

  • sales1@company.com
  • sales2@company.com
  • sales3@company.com

Pro: Simple Con: All eggs in one domain basket

Option 2: Separate domains

  • outreach@company-mail.com
  • hello@trycompany.com

Pro: Domain reputation isolation Con: More setup and maintenance

Rotation Strategy

For 500 emails/day:

  • 3 inboxes
  • ~165 emails each
  • Rotate sending throughout the day

For 1000+ emails/day:

  • 5-10 inboxes
  • Mix of domains
  • Automated rotation with your sending tool

Warming Each Inbox

Every new inbox needs warmup:

  • Start at 10-20/day
  • Increase gradually over 2-4 weeks
  • Use a warmup service for automation
  • Don't skip this step

Monitoring

Track per-inbox:

  • Bounce rates
  • Spam complaints
  • Open rates
  • Reply rates

If one inbox underperforms, investigate before it tanks your whole operation.