Experts and documentation sources indicate that Gmail's approach to email tracking is evolving due to privacy changes and security features. Gmail's image caching and proxying significantly impact the reliability of open rates, as an 'open' might simply mean Gmail loaded the image, not that the recipient actually viewed the email. Google Workspace administrators also have control over email delivery settings affecting tracking. Claims about Gmail changing how it handles dotted opens appear misleading, with Gmail ignoring dots in email addresses a specific feature, not a universal standard. The consensus is marketers should shift to more reliable engagement metrics like click-through rates, website traffic, and conversions.
12 marketer opinions
Recent privacy changes in Gmail and Google Workspace, including image caching and proxying, are significantly impacting the reliability of traditional email open rate tracking. While Gmail itself may not be directly tracking opens in the conventional sense, its privacy-focused features are making it harder for marketers to accurately measure engagement using open rates. Consequently, experts recommend shifting focus to alternative metrics such as click-through rates, website traffic, and conversions to better gauge campaign performance. Gmail also ignores dots in email addresses and uses plus addressing for filtering, which are features to manage email rather than a universal change to email tracking.
Marketer view
Email marketer from SparkPost blog explained back in 2018 that Gmail uses an image proxy which can affect open tracking because all images are fetched via Google's servers. This means that every email appears to be opened by Google, skewing the data.
1 Sep 2024 - SparkPost
Marketer view
Email marketer from ActiveCampaign Blog discusses the evolution of email marketing in response to privacy changes. They highlight the need for marketers to adapt and use more reliable metrics beyond open rates to gauge campaign performance.
27 Mar 2024 - ActiveCampaign Blog
3 expert opinions
Experts generally agree that Gmail's approach to email tracking is evolving, making traditional open rates an unreliable metric. One expert dismisses claims about Gmail changing how it handles dotted opens as misinformation. However, others point to Gmail's image caching and proxying as significant factors that skew open rate data, as an 'open' may simply indicate that Gmail loaded the image, not that the recipient actually viewed the email. Consequently, focusing on alternative engagement metrics, such as click-through rates, is recommended.
Expert view
Expert from Spam Resource indicates that due to various factors including image proxying and privacy features, open tracking is becoming increasingly unreliable as a metric for engagement. They suggest focusing on other metrics, such as click-through rates, to better gauge recipient interest.
6 Sep 2023 - Spam Resource
Expert view
Expert from Email Geeks says the LinkedIn post about Gmail dotted opens is 'bullshit' and it's an intentional scam post to advertise the author's company.
12 May 2023 - Email Geeks
3 technical articles
Google's documentation highlights several factors impacting email tracking within Gmail and Google Workspace. Security features, such as image proxying, can skew open rate accuracy as images are loaded via Google's servers. Moreover, Google Workspace administrators possess customizable email delivery settings that can influence processing and tracking mechanisms, primarily for enhanced security and privacy. Regarding dotted opens, the IETF's RFC 822 indicates that dots in the local-part of email addresses are permissible, suggesting that Gmail's disregard for dots is a unique behavior, rather than an email standard.
Technical article
Documentation from IETF on RFC 822 (the original standard for email) indicates that the local-part of an email address (the part before the @ symbol) can contain dots. This suggests that Gmail's behavior of ignoring dots is a Gmail-specific feature and not a universal email standard.
25 Aug 2021 - IETF
Technical article
Documentation from Google Support explains how Google Workspace provides security features that might affect how emails are tracked. Features like image proxying can impact open rate tracking accuracy, as images are loaded through Google's servers.
18 Feb 2025 - Google Support
Do ISPs re-fetch email tracking images, and what causes delayed email opens?
Does Apple Mail Privacy Protection pre-fetch images from spam folders or only the inbox?
Does Gmail accurately track email opens?
How accurate is email client market share data when Apple Mail intentionally opens messages?
How do AI assistants and MPP impact email open rates, and what are better metrics to measure outbound campaign effectiveness?
How does Apple Mail Privacy Protection (MPP) affect the tracking of email opens and clicks, and how are machine opens categorized?