Postmaster Tools
From: https://support.google.com/mail/answer/998169 1?sjid=16475661690433716483-NC





Get started with Postmaster Tools
You can use Postmaster Tools to track data on large volumes of emails sent
and find data about your sending domain. You can view different dashboards
to understand details like Gmail delivery errors, spam reports, feedback
loop, and more.

To use Postmaster Tools, you need to have a Google Account. If you don’t
have a Google Account, create one.



Add your domain to Postmaster Tools
  1. Sign in to Postmaster Tools.
  2. In the bottom right, click Add Add.
  3. Enter your authentication domain.
    Tip: You can add either the DKIM (DomainKeys Identified Mail) domain or
    the SPF (Sender Policy Framework) domain.
  4. Click Next.
  5. Verify your domain:
    • To prove that you own this domain, click Verify.
      Tip: After verification, it may take some time before your domain’s
      verification status updates to “Verified.” Learn more about how to
      verify your domain.
    • To skip this step and continue without verification, click Not now. You will need to verify your domain at some point to view any data related to that domain. To go back and verify, point to the domain you want to verify. Then, click More More and then Verify domain.

Manage your data access If you own a verified domain, you can share your Postmaster Tools data with anyone who has a Google Account. You can also add and remove owners from your domain. Add someone to your domain Sign in to Postmaster Tools. Point to the verified domain you want to add someone to. On the right, click More More and then Manage users. In the bottom-right, click the “Add” button. In the pop-up window, enter the Google Account email address of the person you want to access your domain's Postmaster Tools data. Tip: When you give someone access, they won’t get a notification, so we recommend you let them know. However, they will be able to see the domain when they log in to Postmaster Tools. Interpret numbers on the dashboard You can use the data from the different dashboards to understand the best way for you to send your emails. Spam rate IP reputation Domain reputation Feedback loop Authentication Encryption Delivery errors Related articles Postmaster Tools FAQs Feedback Loop (FBL) How encryption works Email authentication