If your campaign open rate is hovering near 100% — or just feels too good to be true — it almost always is. Here's what's actually inflating the number and how to read your data without fooling yourself.
How open tracking works
Recruiterflow embeds an invisible 1x1 tracking pixel at the bottom of every email. When the pixel loads, we count it as an open. The catch: plenty of things load that pixel besides a human reading your message. Most of your "opens" are real signal, but a meaningful chunk are noise.
What's inflating your numbers
Apple Mail Privacy Protection (MPP). The single biggest source of inflation for most senders. Apple Mail pre-fetches every image — including the tracking pixel — to Apple's servers the moment an email arrives, before the recipient even sees it. Every iPhone, iPad, or Mac recipient with MPP enabled registers as an instant open. If your audience skews Apple, expect a large share of your "opens" to come from this alone.
Corporate security scanners. IT teams at larger companies run inbound and outbound mail through filters that load every link and image to check for malware. These scans look identical to human opens and often fire within seconds of sending — usually visible as multiple recipients at the same company "opening" the email at the same instant.
Gmail and Outlook preview panes. Hovering over an unread email in the inbox preview pane is enough to load the pixel and register an open.
Forwards and CC'd recipients. Anyone the email reaches — not just the primary To: address — triggers the same pixel. Every forward is another open on that recipient's count.
You opening your own Sent folder. Opening the sent message inside Gmail or Outlook fires the pixel from your own machine. Check sent emails inside Recruiterflow's email tab instead, where this isn't counted.
Bounce notifications. Some bounces include the full original message — pixel and all — and loading the bounce in your inbox can register as an open.
Copy-pasted templates. If you paste content from a previous outbound email into a new draft instead of starting from a template, the old tracking pixel can come along and inflate the new email's metrics. Paste as plain text, or build from a saved template.
How to read open rates the right way
Use opens for relative trends, not absolute truth. A subject line that lifts opens from 30% to 45% is real signal — even if the underlying lift is smaller. Compare campaigns against each other on the same audience, not against an industry benchmark from a different list. And if open rate is your only success metric, switch to reply rate and meetings booked — scanners don't reply.
Practical example
A recruiter sees a campaign at 92% opens and 0.8% reply. Their first instinct is to celebrate the open rate — but the disconnect is the tell. Most of those opens are MPP and security scanners; the reply rate is the real measure. Iterating on subject lines won't move the needle here. The message, audience fit, or call-to-action is what needs work.
Things to know
Open tracking accuracy has been declining industry-wide since Apple MPP launched in 2021. This isn't a Recruiterflow-specific issue.
You can't eliminate false opens. The pixel is an industry standard, and so are the systems that auto-load it.
For cleaner data, send to smaller, more targeted lists where false positives have less impact, and weight reply rate above open rate when comparing campaigns.