Overview
When end-users unsubscribe from emails using the Gmail "Manage subscriptions" feature, Bloomreach may record multiple unsubscribe (consent reject) events for the same customer, email, and consent category within a short time window.
This article explains what you may see in the customer profiles regarding consent events, why they happen, and what it means for your campaigns or analysis.
Symptoms
In Customer profile → Consents, or in consent-related event data, you may observe:
Several consecutive consent reject events for the same consent category (for example, Newsletter)
All events coming from the same Gmail address
All events having source =
list-unsubscribeEvents occurring:
within seconds or minutes of each other, or
clustered within a time window (for example, multiple events over ~30 minutes)
In all of these cases, the user typically reports that they:
Opened Gmail
Used the "Manage subscriptions" option
Clicked Unsubscribe only once for a given sender/newsletter
Root cause (behavior in Gmail)
Based on current observations:
The Gmail "Manage subscriptions" UI triggers unsubscribe requests via the list-unsubscribe mechanism on behalf of the user.
For reliability/failsafe reasons, Gmail can send the same unsubscribe request multiple times to the sender's system.
Bloomreach receives each of these HTTP requests and records them as separate consent events.
As a result, you may see several consent reject events in a row, even though the end-user performed only one visible "unsubscribe" action in Gmail.
Note: The exact internal logic and retry schedule of Gmail’s “Manage subscriptions” feature is not publicly documented by Google. The behavior described above is inferred from real-world examples and internal testing.
Impact in Bloomreach
1. Customer consent status
The most recent consent event determines the customer's consent status.
Once the first reject (unsubscribe) event is processed:
The customer becomes unsubscribed from the affected category.
Additional identical reject events don't re-subscribe the customer or change the status further.
In other words, multiple events don't cause additional sending; they only duplicate the audit trail.
2. Reporting and analysis
You may see:
Inflated counts of unsubscribe/consent-reject events if you aggregate the number of events rather than distinct customers.
Multiple rows for the same customer + category when exporting or analyzing consent events.
When looking at metrics, we recommend:
Prefer unique customer counts over raw event counts when analyzing unsubscribes.
Use deduplication rules in your analytics (for example, group by customer, category, and a short time window, and treat clustered events as a single unsubscribe action).
Current platform behavior and limitations
At this time:
Bloomreach records all incoming unsubscribe calls individually, including repeated ones coming from Gmail's "Manage subscriptions".
There is no built-in deduplication of repeated list-unsubscribe calls from email providers.
Gmail fully controls the frequency and retry behavior, and can't be configured from within Bloomreach.
Improvements, such as automatic deduplication of identical list-unsubscribe events, are under consideration but not yet available.
FAQ
Does this mean my customer unsubscribed multiple times?
No. In the cases we have seen, the end-user only clicked 'Unsubscribe' once in Gmail. The additional events are likely retries or automatic re-calls by Gmail.
Will this cause more emails to be sent or any compliance issues?
No:
Once a customer unsubscribes from the first event, they remain unsubscribed.
Additional identical unsubscribe events don't re-subscribe them or cause extra sends.
The extra events only affect the audit trail and raw event counts, not the actual sending behavior.
Can Bloomreach stop Gmail from sending repeated requests?
No.
The number and timing of unsubscribe requests sent via Gmail's "Manage subscriptions" feature are controlled entirely by Google and can't be changed from within Bloomreach.
Can I configure the platform to record only a single event?
Not currently. Today, Bloomreach:
Logs each received unsubscribe request separately for full traceability.
Doesn't automatically merge or deduplicate repeated list-unsubscribe calls.
If you need a "single-unsubscribe-per-customer" metric, you can implement it at the reporting level using the deduplication guidance above.
Summary
Gmail's "Manage subscriptions" feature can trigger multiple list-unsubscribe calls for a single user action.
Bloomreach currently records each call as a separate consent reject event, which may appear as multiple unsubscribes in the log.
The customer's final consent status is correct (unsubscribed), and sending behavior isn't negatively affected.
Treat this as a known behavior and use unique customer-based metrics or deduplication when analyzing unsubscribe data.