# deliverability after Gmail bulk rules: HubSpot and SendGrid field notes
Canonical: https://marketinginbox.dev/ja/posts/gen-52-deliverability-hubspot

We ran a working session on deliverability after Gmail bulk rules using HubSpot and SendGrid. The goal was a realisti...

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