B2B Marketing improved email deliverability by cleaning its subscriber list and leveraging engagement data. By validating emails, suspending 78,000 unengaged contacts, and implementing a re-engagement campaign, they restored sender reputation and improved inbox placement. Their efforts resulted in 10,000 new unique opens, a 2.8% increase in open rate, and a 2% reactivation of previously removed contacts. They retained nearly 70% of their original list while ensuring only engaged subscribers received weekly newsletters. This strategy strengthened email performance and long-term audience engagement.

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