# List cleaning without killing engagement

*@newsletter_ned | Ecommerce | 10 months ago*

Context: PLG onboarding team, 1M monthly sends. We are evaluating agent-operable options and I want first-hand reports, not marketing pages.

Specifically interested in MCP and automation depth.

## Comments

**flow_builder** (120 votes): Resend MCP plus React Email is clean if engineers own transactional.

  **andre_j** (48 votes): OAuth setup took an afternoon but tool discovery is worth it.

    **ingrid_s** (76 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

**klaviyo_curious** (67 votes): We tried this last quarter. Read-only MCP first made the difference.


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