Postmaster Tools helps email senders analyze email performance and deliver messages to the right place. With Postmaster Tools, you have access to data and diagnostics about your email, including delivery errors, spam reports, and feedback loops.
Email sender guidelines & Postmaster Tools
We recommend email senders use Postmaster Tools to make sure they’re meeting the requirements in Gmail’s Email sender guidelines.
To learn more about Postmaster Tools, visit Get Started with Postmaster Tools. You can also sign in to Postmaster Tools.
Postmaster Tools dashboards for email senders
These Postmaster Tools dashboards provide detailed information about your email delivery and message format:
SPF and DKIM authentication
The Postmaster Tools Authentication dashboard provides detailed information about SPF and DKIM authentication. If your organization uses more than one domain and uses more than one DKIM key or SPF record, this dashboard might show no authentication for your domains that don’t send email.
For example, you might have 2 domains, solarmora.com and support.solarmora.com, and have email authentication (DKIM and SPF) set up for both. However, if you only use solarmora.com to send email, Postmaster Tools might show no authentication results for support.solarmora.com.
To learn more about SPF and DKIM, visit Prevent spam, spoofing & phishing with Gmail authentication.
DMARC authentication
To check the details of your DMARC authentication, use a third-party DMARC authentication tool from the internet. We recommend you always set up DMARC authentication for your domain. Your DMARC policy can be set to minimal enforcement, using a policy that’s set to none (p=none) and applied to 0% of your messages (pct=0).
To learn more about setting up DMARC, visit Help prevent spoofing and spam with DMARC.
