How can I detect and segment bot clicks in email campaigns?

Summary

Detecting and segmenting bot clicks in email campaigns is a multifaceted challenge addressed through various strategies. These strategies encompass prevention at signup via reCAPTCHA and double opt-in, employing honeypot techniques like hidden images or fields, analyzing engagement metrics (click-to-open rates, time to click), monitoring IP addresses for unusual activity, scrutinizing user agent data, tracking signup sources, and using bot management tools. The aim is to identify and isolate bot traffic to improve reporting accuracy, overall deliverability, and campaign performance.

Key findings

  • Honeypot Effectiveness: Hidden elements like blank images and fields effectively attract bot interactions for easy identification and segmentation.
  • Engagement Anomaly Detection: Analyzing engagement metrics reveals bot activity through unusually high or low engagement patterns.
  • Proactive Signup Measures: Implementing reCAPTCHA and double opt-in prevents bots from subscribing to email lists.
  • IP and UA Monitoring: Tracking IP addresses and user agent data uncovers suspicious sources and patterns linked to bots.
  • Real-Time Bot Management: Bot management tools detect and mitigate bot traffic using behavioral analysis and other techniques.
  • Seed List Monitoring: Seed lists provide insight into inbox placement and engagement rates, which can highlight discrepancies that indicate bot activity.

Key considerations

  • False Positives Mitigation: Ensure bot detection methods are finely tuned to minimize accidental identification of legitimate users as bots.
  • Data Privacy Adherence: Comply with data privacy regulations when collecting and analyzing user data for bot detection purposes.
  • Continuous Adaptation: Recognize the evolving nature of bot tactics and adapt detection methods and strategies accordingly.
  • Impact on User Experience: Consider the potential impact of security measures (e.g., reCAPTCHA) on user experience and optimize accordingly.
  • Tool Integration and Accuracy: Verify that selected tools integrate seamlessly with existing marketing platforms and provide accurate reporting to make informed decisions.
  • Strategic Bot Handling: Develop a clear strategy for how to handle segmented bot traffic, such as excluding them from campaigns and/or improving security to reduce future bot signups.

What email marketers say
9Marketer opinions

Detecting and segmenting bot clicks in email campaigns involves a multi-faceted approach. Strategies include employing honeypot traps like blank images or hidden fields to identify bots, monitoring IP addresses for suspicious activity, analyzing engagement metrics such as click-to-open ratios and time-to-click, and scrutinizing user agent data. Implementing double opt-in and using email verification tools can reduce bot sign-ups and clicks. Ultimately, the goal is to identify and segment these bots to prevent skewed campaign metrics and improve email deliverability.

Key opinions

  • Honeypot Traps: Using hidden elements like blank images or fields can lure bots, allowing for easy identification and segmentation.
  • IP Monitoring: Monitoring IP addresses for unusually high click volumes from a single source helps pinpoint bot activity.
  • Engagement Metrics: Analyzing click-to-open ratios and time spent viewing emails can expose bot behavior due to unnatural engagement patterns.
  • User Agent Analysis: Scrutinizing user agent data helps identify bots using outdated or suspicious identifiers.
  • Time to Click: Monitoring the time between email delivery and clicks helps identify bots, which often click almost immediately.

Key considerations

  • False Positives: Ensure bot detection methods minimize false positives to avoid incorrectly segmenting legitimate users.
  • Data Privacy: Adhere to data privacy regulations when collecting and analyzing user data for bot detection.
  • Tool Integration: Choose bot detection methods that integrate seamlessly with existing email marketing platforms.
  • Ongoing Monitoring: Bot behavior evolves, so continuously monitor and refine detection methods for sustained accuracy.
  • Segmentation Strategy: Develop a clear strategy for how to handle segmented bots, such as excluding them from future campaigns.
Marketer view

Email marketer from Email Geeks shares that adding a 'blank' image at the top left of the email resulted in over 100 clicks, confirming bot activity in checking links and raises the question of how to adjust reporting to account for this.

July 2022 - Email Geeks
Marketer view

Email marketer from Litmus shares that monitoring IP addresses for suspicious activity, such as a high volume of clicks from a single IP in a short period, can help detect bot clicks. You can then segment these IP addresses to prevent them from skewing your campaign metrics.

February 2025 - Litmus
Marketer view

Email marketer from StackExchange shares that analyzing user agent data can reveal bots. Bots often use specific or outdated user agents. Segment users with suspicious user agent strings.

August 2023 - StackExchange (Webmasters)
Marketer view

Email marketer from Neil Patel Digital explains that using honeypot traps, such as hidden fields or links, is an effective method to identify bots. Bots are more likely to interact with these traps, allowing you to segment and exclude them from your legitimate audience.

May 2021 - Neil Patel Digital
Marketer view

Email marketer from ActiveCampaign explains that employing a double opt-in process ensures that only genuine subscribers are added to your email list, reducing the likelihood of bot-generated clicks. This method requires new subscribers to confirm their subscription via a confirmation email.

December 2022 - ActiveCampaign
Marketer view

Email marketer from Reddit explains that tracking the time between email delivery and link clicks can help identify bots. Bots often click links immediately or within a few seconds, which is uncharacteristic of human behavior. Segment users with unusually fast click times.

December 2022 - Reddit (r/EmailMarketing)
Marketer view

Email marketer from Email Geeks likens the blank image click tracking to the "hidden field" method for filtering bad signups, suggesting that anyone clicking the blank image link should be treated as a bot and excluded from regular click reporting.

March 2025 - Email Geeks
Marketer view

Email marketer from ZeroBounce shares that using email verification tools to validate email addresses before sending campaigns helps to remove invalid or bot-created addresses. This reduces the chances of bot clicks and improves overall email deliverability.

October 2023 - ZeroBounce
Marketer view

Email marketer from EmailDrips explains that analysing engagement metrics such as click-to-open ratios and time spent viewing emails, can expose bot activity. Segmenting users with unusually high or low engagement scores can help isolate potential bots.

October 2021 - EmailDrips

What the experts say
4Expert opinions

Detecting and segmenting bot clicks in email campaigns involves a combination of strategies. These include defining specific behaviors as "clickbot"-y and creating segments for those individuals, reducing the size of honeypot images to prevent accidental clicks, monitoring for unusually high click rates, and utilizing seed list placement to identify discrepancies in engagement indicative of bot activity. These efforts aim to isolate and manage bot interactions, improving data accuracy and campaign performance.

Key opinions

  • Behavioral Definition: Defining and categorizing specific actions as "clickbot"-y helps in creating targeted segments for bot management.
  • Honeypot Optimization: Minimizing the visibility of honeypot images by resizing them can reduce accidental human interaction.
  • Click Rate Monitoring: Unusually high click rates serve as a red flag, suggesting potential bot activity or automated link checking.
  • Seed List Utilization: Seed lists provide insights into inbox placement and can reveal discrepancies between expected and actual engagement, indicative of bots.

Key considerations

  • Accidental Clicks: Ensure that honeypot techniques and detection methods are fine-tuned to minimize accidental clicks by real users.
  • Dynamic Bot Behavior: Recognize that bot behaviors evolve, so strategies need continuous adaptation to remain effective.
  • False Positives: Balance bot detection accuracy to minimize false positives and avoid inadvertently excluding legitimate users.
  • Reporting Accuracy: Exclude identified bots from campaign reporting to ensure accurate performance metrics and informed decision-making.
Expert view

Expert from Word to the Wise responds that seed list placement allows for monitoring the inbox placement. This can show discrepancies between expected engagement and actual engagement, possibly identifying bot clicks if the engagement is unusually high on seed accounts.

August 2022 - Word to the Wise
Expert view

Expert from Email Geeks suggests resizing the image to 1x1 to prevent accidental clicks from users dragging their mouse and noticing the pointer change.

December 2021 - Email Geeks
Expert view

Expert from Spam Resource explains that unexpected high click rates can be an indication of bot activity. They also mention some anti-spam systems can activate all links in an email to check for malicious content, resulting in artificial clicks.

November 2023 - Spam Resource
Expert view

Expert from Email Geeks explains that they define behaviors as "clickbot"-y, move those individuals into their own segment, and report only on the non-"clickbot"-y people, maintaining them in the segment until the behavior ceases.

January 2022 - Email Geeks

What the documentation says
3Technical articles

Detecting and segmenting bot clicks in email campaigns can be achieved through preventative measures at the signup stage and ongoing bot management. Implementing reCAPTCHA on signup forms helps ensure that only humans subscribe, reducing bot-generated activity. Tracking signup sources reveals suspicious origins indicative of bots, allowing for segmentation. Comprehensive bot management tools utilize behavioral analysis and challenge-response tests to identify and mitigate bot traffic throughout the email campaign lifecycle.

Key findings

  • reCAPTCHA Implementation: Employing reCAPTCHA during signup effectively prevents bots from joining email lists.
  • Signup Source Tracking: Monitoring signup origins can uncover suspicious sources associated with bot activity.
  • Bot Management Tools: Comprehensive bot management systems provide advanced techniques for detecting and mitigating bot traffic.

Key considerations

  • User Experience: Ensure that security measures like reCAPTCHA do not negatively impact the user experience for legitimate subscribers.
  • Data Analysis: Regularly analyze signup source data to identify and address emerging bot patterns.
  • Tool Integration: Verify that bot management tools are compatible with your email marketing platform and provide accurate reporting.
  • Ongoing Updates: Keep bot management tools updated to adapt to evolving bot tactics and maintain effective protection.
Technical article

Documentation from Cloudflare shares that implementing bot management tools can help detect and mitigate bot traffic. These tools use various techniques, such as behavioral analysis and challenge-response tests, to identify bots and prevent them from interacting with your email campaigns.

August 2022 - Cloudflare
Technical article

Documentation from Mailchimp responds that tracking signup sources is key. This helps identify if a large number of signups are coming from suspicious or unknown sources, which may indicate bot activity. You can then segment these signups for further scrutiny.

April 2024 - Mailchimp
Technical article

Documentation from Google reCAPTCHA explains that implementing reCAPTCHA on signup forms helps to prevent bots from subscribing to email lists. By verifying that a user is human, you can reduce the number of bot-generated clicks in your email campaigns.

November 2021 - Google reCAPTCHA Documentation