Google Postmaster Tools (GPT) tracks domain and subdomain reputation based on various factors including spam complaints, feedback loops, email authentication (SPF, DKIM, and DMARC), engagement metrics, and sending volume. GPT tracks reputation individually for each subdomain, making it crucial to monitor them separately, especially for different email types. The 'd=' value in the DKIM signature is a key element in tracking reputation, although Google also tracks the 'from:' line. Proper authentication is vital, as GPT provides insights into issues affecting deliverability. Google may use different thresholds and volume requirements for reputation levels depending on the type of mail. Consistent email volume is also a crucial factor. Registering the main domain in GPT simplifies the addition of subdomains.
10 marketer opinions
Google Postmaster Tools (GPT) is used to monitor domain and subdomain reputation with Gmail users. GPT tracks reputation individually for each subdomain, making it crucial to monitor each separately, especially if used for different email types. Reputation is based on factors like spam complaints, email authentication (SPF, DKIM, DMARC), engagement metrics, and sending volume. Registering the main domain in GPT facilitates adding subdomains. Monitoring sender reputation is essential for identifying and addressing issues affecting email deliverability.
Marketer view
Email marketer from Gmass explains the importance of email authentication, and that Google will track unauthenticated mail and that it is a key factor in tracking domain reputation.
24 Dec 2023 - Gmass
Marketer view
Email marketer from SparkPost Blog responds by sharing that while Google Postmaster Tools provides overall domain reputation, it's crucial to monitor subdomains separately if they handle distinct email streams. Different subdomains might have varying sender reputations based on their sending practices.
1 Apr 2022 - SparkPost Blog
4 expert opinions
Google Postmaster Tools tracks domain reputation primarily through the 'd=' value in the DKIM signature, irrespective of the sending domain or IP. Adding authenticated subdomains is automated in GPT. Google uses different thresholds based on mail verticals and requires specific volumes to assess reputation levels. Email volume is a vital factor for establishing and monitoring domain reputation, allowing Google to accurately gauge sender behavior and assign scores.
Expert view
Expert from Spam Resource explains that email volume is a crucial factor in establishing and tracking domain reputation in Google Postmaster Tools. Consistent sending volumes enable Google to accurately assess sender behavior and assign reputation scores.
9 Oct 2023 - Spam Resource
Expert view
Expert from Email Geeks explains that Google Postmaster Tools defaults to tracking by the d= value in the DKIM signature and it has nothing to do with the sending domain or sending IP. Google will track each domain reputation in the from: line as well, but you just don’t get that data.
25 Nov 2023 - Email Geeks
4 technical articles
Google Postmaster Tools provides insights into domain reputation using metrics like spam reports, feedback loops, and authentication results to identify deliverability issues. SPF, DKIM, and DMARC authentication methods significantly impact domain reputation by ensuring emails are recognized as legitimate. The 'd=' tag in the DKIM signature associates emails with a domain, which GPT uses for tracking. DMARC policy allows domain owners to specify how to handle unauthenticated email, affecting the domain's reputation tracked by Google Postmaster Tools.
Technical article
Documentation from RFC 4871 answers how DKIM signatures associate an email with a specific domain. The 'd=' tag in the DKIM signature indicates the domain responsible for the email, which Google Postmaster Tools uses for tracking domain reputation.
18 Oct 2023 - RFC 4871
Technical article
Documentation from Google Postmaster Tools Help explains that the tool provides insights into your domain's reputation with Gmail users, including spam reports, feedback loop, and authentication metrics. It helps you identify potential issues affecting your email deliverability.
27 Sep 2022 - Google Postmaster Tools Help
Can I monitor email reputation for B2B G-Suite domains using Google Postmaster Tools?
Do I need to add all subdomains to Google Postmaster Tools?
Does Google Postmaster Tools domain reputation include subdomains?
Does subdomain data roll up to the root domain in Google Postmaster Tools?
How accurate is the spam data shown in the new Google Postmaster Tools and how can I get data to appear?
How do I add a TXT record to a DNS configuration for Google Postmaster?