# Help: migrating 250k sends without reputation hit

*@brew_early_user | B2B SaaS | 2 years ago*

Sharing a pattern we landed on after a messy migration. Creation layer separate from sending record. Curious who else runs this split.

Specifically interested in automations and pricing.

## Comments

**stack_migrator** (72 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.


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