Google Postmaster: what it is and why to use it

Google Postmaster Tools is a free tool from Google that gives you visibility into how Gmail handles your emails — including your domain reputation, spam rates, and deliverability. We strongly recommend all rasa.io clients set it up.

How to get started

Visit postmaster.google.com and sign in with a Gmail or Google Workspace account. Add your sending domain and complete the verification process.

Key metrics to watch

Spam Rate — the percentage of your emails that Gmail users mark as spam. Keep this below 0.1%. At 0.3%, Google may start filtering your emails to spam for all Gmail recipients.

Domain Reputation — a high-level score (High, Medium, Low, or Bad) reflecting how Gmail views your sending domain. Aim for High. If your reputation is trending down, investigate why and take action quickly.

Why this matters

rasa.io's analytics don't include spam complaint data from Gmail — that data only flows through Google Postmaster. So the spam rate and domain reputation data in Postmaster is more complete and reliable than what you see in the rasa.io dashboard.

Best practices

• Check Postmaster regularly — monthly at minimum, weekly if you send frequently
• If spam rates rise, review your list hygiene and content quality
• Make sure domain authentication (SPF, DKIM, DMARC) is fully set up — see How to authenticate your domain
• If you see a sudden drop in domain reputation, contact support@rasa.io so we can help investigate