True or false? Open rates are a reliable metric and can serve as the foundation of any deliverability strategy.
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Correct answer: False.
Why this is the answer
Open rate can provide engagement context, but it is not reliable enough to anchor a full deliverability strategy. Opens depend on image loading, tracking settings, privacy filters, and non-human activity detection. HubSpot treats deliverability as a broader feedback loop that includes clicks, spam complaints, bounces, unsubscribes, and engagement quality. A stronger strategy uses multiple signals instead of relying on a single metric.
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