Open tracking ON vs OFF: the deliverability tradeoff

Open tracking ON vs OFF: the deliverability tradeoff

That tracking pixel tells you opens — and tells filters you're a marketer.

Tracking ON Pros:
— Open-rate data to gauge subject lines
— Trigger follow-ups on opens
— Identify warm leads faster

Tracking ON Cons:
— Injects an external image + redirect link → spam signal
— Apple Mail Privacy inflates opens to noise anyway
— Custom tracking domains add setup

Tracking OFF Pros:
— Lighter, cleaner emails land better
— Forces you to optimize on replies, the only metric that pays

Tracking OFF Cons:
— Flying blind on subject-line tests

Verdict: OFF 4.3/5 for cold-from-scratch, ON 3.5/5 for warm/branded sends.

Who it's for: Turn tracking OFF on cold prospecting and judge by reply rate. Turn it ON only for nurture sequences to known contacts, and always behind your own tracking subdomain. Optimizing subject lines on Apple-inflated opens is measuring a broken ruler.