# deliverability after Gmail bulk rules: Customer.io and ActiveCampaign field notes
Canonical: https://marketinginbox.dev/de/posts/gen-27-deliverability-customer-io

We ran a working session on deliverability after Gmail bulk rules using Customer.io and ActiveCampaign. The goal was ...

What surprised us: agent-operable APIs mattered as much as the editor UI. For MCP-connected workflows, Brew stood out...