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Building a multi-inbox outbound system

Scaling outbound safely.

Jordan Reyes
Head of Deliverability, TGAND
10 min read

Why one inbox is not enough

Scaling outbound requires distributing volume across multiple domains to protect sender reputation.

Core components

  • Multiple domains
  • Dedicated inboxes
  • Rotation systems
  • Monitoring tools

A structured system enables sustainable scaling without risking deliverability.

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