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 bulk senders use Postmaster Tools to make sure they’re meeting the requirements in Gmail’s Email sender guidelines.
In early 2024, Google plans to add a compliance status dashboard to Postmaster Tools. Until then, senders should monitor their compliance with our email sender guidelines using the information available today in Postmaster Tools, as well as other online tools available on the internet.
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,
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
To learn more about SPF and DKIM, visit Prevent spam, spoofing & phishing with Gmail 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
p=none) and applied to 0% of your messages (
To learn more about setting up DMARC, visit Help prevent spoofing and spam with DMARC.