Why does my Open Rate or Click Rate exceed 100%?
If you see an Open Rate or Click Rate above 100% anywhere in the platform, here is what is happening and how we handle it.
What Causes Inflated Rates
Email security scanners such as Microsoft SafeLinks, Mimecast, Proofpoint, and Gmail's own link preview services automatically pre-fetch every link and tracking pixel in incoming email to check them for malware and phishing. They do this with non-human user-agents, often before the recipient has even seen the message. Each pre-fetch can register as an open or click in raw tracking data, which artificially inflates the counters.
In some environments, a single email can trigger 2-3 scanner opens and 3-5 scanner clicks before a human ever touches it — which is how raw open or click counts can exceed the number of emails sent.
How WarmySender Filters Scanners
We filter these security scanners out at the tracking endpoints by matching known scanner user-agents, IP ranges, and request patterns. Filtered events are excluded from your displayed numbers so you get accurate metrics instead of raw counters.
100% Safety Cap
As an additional safety guard, displayed Open Rate and Click Rate values are capped at 100%. You will never see '127%' shown in the UI — even if raw data were temporarily off, the display clamps to 100%.
If You Still See Inflated Numbers
If a campaign shows a rate suspiciously close to or at 100% and you think something is off, the most common cause is recent re-enrollment of prospects. When you re-enroll prospects into a campaign, the original tracking links from previous enrollment cycles can still fire if a scanner pre-fetches them later. This can make it look like a single send is generating multiple events.
Recommendation: Trust Reply Rate
We recommend treating Reply Rate as your primary engagement metric. Replies are not faked by scanners — they come from real humans who actually read your message. Open Rate and Click Rate are useful directional signals, but Reply Rate is the number that reflects real interest in your outreach.