Email Open Tracking: How the Pixel Works (and Its Limits)
How open tracking works, why privacy features broke it, and what to measure instead for an honest read on engagement.
Email open tracking works with a tiny invisible image — the "tracking pixel". When the client loads it, the sender records an open. Simple, but in 2026 it is only half the story.
Why it is unreliable now
Apple Mail Privacy Protection and similar features pre-load images on a proxy, firing an open whether or not a human looked. That inflates open rates and breaks open-based automation.
What to do about it
- Use opens as a trend, never an absolute count.
- Trigger automations on clicks, not opens.
- Track conversions as the real measure of success.
Send email that actually lands in the inbox
API and visual editor, SPF/DKIM/DMARC out of the box, analytics and warm IPs. Free tier — 200 emails/month, no card required.
Opens still have uses
Relative comparisons — this subject line vs that one — remain useful even with inflation, as long as both samples are affected equally.
Measure what matters
Sendersy reports opens, clicks and conversions separately so you are never fooled by a single number. Start free.
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