What is Google Postmaster?
Google Postmaster Tools is a free service provided by Google that allows domain owners to monitor and analyse the sending reputation of their email domains. With this tool, you can access your domain’s rating of whether it is Bad, Low, Medium or High.
In addition, Google Postmaster's various dashboards will also show you data about Gmail delivery errors, spam reports, feedback loop, and more.
How to set up Google Postmaster?
1. Sign into Postmaster Tools.
2. Click the + button at the bottom right and enter your authentication domain name in the popup box.
3. Google Postmaster will instruct you to create a TXT record in the DNS for your domain.
4. Click “Verify” to prove that you own this domain.
How to check and interpret your domain reputation?
Google Postmaster keeps you informed with daily report updates, providing insights into the prior day’s performance.
- Bad: A history of sending an enormously high volume of spam. Mail coming from this entity will almost always be rejected at SMTP or marked as spam.
- Low: Known to send a considerable volume of spam regularly, and mail from this sender will likely be marked as spam.
- Medium/Fair: Known to send good mail, but has occasionally sent a low volume of spam. Most of the email from this entity will have a fair deliverability rate, except when there’s a notable increase in spam levels.
- High: Has a good track record of a very low spam rate, and complies with Gmail's sender guidelines. Mail will rarely be marked by the spam filter.
A higher domain reputation means emails from your sending domain (SPF and DKIM) are less likely to get filtered to a recipient’s spam folder or inbox.
Follow email best practices, including proper authentication (DKIM, SPF, DMARC), maintaining a clean subscriber list, and providing relevant and engaging content.