Google Postmaster Tools (GPT)

What is it?

What is it?

"Google Postmaster Tools (GPT)" is a free service provided by Google to help email senders monitor and analyze email deliverability and performance for Gmail users. GPT provides senders valuable insights and metrics regarding inbox placement, spam complaints, domain reputation, and email authentication. This allows them to optimize email campaigns and maintain a positive sender reputation.

Key points to remember

Key points to remember

  • Dashboard Metrics: GPT offers a dashboard with crucial deliverability metrics, including inbox placement rates (IPR), spam rates, domain reputation scores, authentication status (SPF, DKIM, DMARC), and feedback loop (FBL) data, providing senders with visibility into their email performance.

  • Inbox Placement Insights: GPT provides data on the percentage of emails that land in the Gmail inbox versus the spam folder, allowing senders to assess their email delivery effectiveness and identify factors influencing inbox placement, such as sender reputation, content quality, and subscriber engagement.


  • Spam Feedback: GPT includes information on spam complaints generated by Gmail users, enabling senders to monitor complaint rates, investigate potential issues with email content or frequency, and take corrective actions to reduce complaints and improve sender reputation.


  • Authentication Status: GPT verifies the authentication status of sender domains using SPF, DKIM, and DMARC protocols, highlighting any authentication failures or configuration issues that may impact email deliverability and security.


  • Recommendations and Best Practices: Based on analyzing email performance data, GPT recommends improving deliverability, enhancing sender reputation, and optimizing email campaigns for Gmail users.

Example of Use

Example of Use

  1. Deliverability Analysis: An email marketer uses GPT to analyze deliverability metrics and identify trends in inbox placement, spam rates, and domain reputation across different email campaigns, adjusting sending practices and content strategies to improve overall deliverability.


  2. Authentication Troubleshooting: A system administrator troubleshoots authentication issues reported by GPT, resolves SPF or DKIM configuration errors, and implements DMARC policies to enhance email security and authentication compliance.

Find and verify emails for free