Determining Gmail spam folder placement rate is challenging due to the lack of a direct metric in Google Postmaster Tools (GPT). While GPT provides some insights, the spam rate it shows is based on user-reported spam, not actual inbox placement. As such, a combination of approaches is necessary. Domain and IP reputation are sometimes considered meaningless, and the focus should instead be on spam rates. Seed lists are valuable for testing inbox placement by tracking where test emails land across various email providers. Several deliverability testing tools, like GlockApps and MailMonitor, can automate this process and provide detailed reports. In addition to testing, improving sender reputation, authenticating emails (SPF, DKIM, DMARC), maintaining consistent sending volumes, segmenting email lists, and promoting high engagement rates (opens, clicks) are crucial for avoiding the spam folder. Understanding how different ISPs filter spam and utilizing feedback loops (FBLs) to analyze user-reported complaints can also inform deliverability strategies. Finally, maintaining consistent IP address activity, delivering relevant content, regularly cleaning email lists, and avoiding blacklists are essential for optimizing email delivery.
13 marketer opinions
Determining Gmail spam folder placement rate is a complex task, as Google doesn't directly provide this metric. While domain and IP reputation data from Google Postmaster Tools (GPT) can offer some insights, its relevance is debated. The spam rate in GPT is based on user-reported spam, not actual inbox placement. To gauge deliverability, marketers rely on a combination of methods, including inbox placement testing using seed lists and deliverability testing tools like GlockApps and MailMonitor. These tools send test emails to various providers and report inbox vs. spam placement. Maintaining a good sender reputation, authenticating emails (SPF, DKIM, DMARC), consistent sending volumes, list segmentation, and high engagement rates are also crucial in avoiding the spam folder.
Marketer view
Email marketer from Email Geeks shares that domain and IP reputation data is meaningless from his point of view, so he ignores it and focuses on spam rate.
23 Aug 2023 - Email Geeks
Marketer view
Email marketer from GMass Blog shares that you can use tools like GlockApps to run deliverability tests and seed list testing by sending your campaigns through them. You’ll then receive a report of how many emails went to the inbox vs. spam folder for various mailbox providers.
14 Jun 2023 - GMass Blog
2 expert opinions
Determining Gmail spam folder placement rate requires monitoring alternative data sources due to the lack of direct metrics. Experts recommend using seed lists to track where test emails land and implementing feedback loops (FBLs) to analyze user-reported spam complaints. Understanding how ISPs filter spam and responding to feedback from FBLs are crucial steps for addressing deliverability issues and improving inbox placement.
Expert view
Expert from SpamResource explains that while a precise spam folder placement rate is difficult to obtain, monitoring seed list results and feedback loops (FBLs) helps gauge deliverability. Seed lists show where test emails land, while FBLs provide data on user-reported spam complaints, offering insights into potential issues.
17 Mar 2023 - SpamResource
Expert view
Expert from Word to the Wise shares that understanding how different ISPs filter spam and implementing feedback loops are essential. By analyzing the feedback received from ISPs, senders can identify and address issues that lead to spam complaints, ultimately improving inbox placement.
22 Mar 2023 - Word to the Wise
4 technical articles
While Google Postmaster Tools offers insights into email performance, it doesn't directly show Gmail spam folder placement rate. Instead, monitoring spam complaints, authentication (SPF, DKIM, DMARC), and reputation metrics can help infer deliverability issues. Seed lists are also a valuable resource, as they are collections of email addresses used to test inbox placement. Sending test emails to these lists and tracking where they land (inbox vs. spam folder) provides insights into deliverability rates across various email providers. DKIM and DMARC help verify the domain and prevent email spoofing, which can both improve email deliverability and reduce spam folder placement.
Technical article
Documentation from DMARC.org explains DMARC (Domain-based Message Authentication, Reporting & Conformance) helps prevent email spoofing. Implementing a DMARC policy can improve email deliverability by telling receiving mail servers what to do with messages that fail SPF and DKIM checks, reducing the likelihood of spam folder placement.
14 Mar 2025 - DMARC.org
Technical article
Documentation from RFC-Editor explains DKIM provides a method for verifying the domain name associated with a message through cryptographic authentication. This can improve email deliverability and reduce spam folder placement by confirming the sender's authenticity.
23 Aug 2021 - RFC-Editor
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