Home/Fix/Campaign Performance ProblemsCampaign Performance ProblemsInvestigate low opens, high unsubscribes, and related campaign metrics.Reading time: 8 minDifficulty: IntermediateEstimated duration: 8 minPrerequisites: ReputationLast updated: 2026-07-17Author: EmpirePrerequisitesReputationHow mailbox providers judge senders from IP, domain, and behavioral signals over time.▼Related learningReputationHow mailbox providers judge senders from IP, domain, and behavioral signals over time.▼Related problemsHigh unsubscribe rateUnsubscribe or list-unsubscribe activity spikes, signaling relevance, frequency, or consent problems.Low open rateOpen rates fall sharply — often a placement, identity, or measurement problem rather than subject lines alone.▼Recommended toolsZeroBounceEmail validation and list hygiene service that scores address quality before you send.NeverBounceEmail verification platform for real-time and bulk list validation.Continue LearningWarmup ProblemsFix aggressive ramps, volume spikes, interrupted warmups, and burned identities.PreviousReputation ProblemsNextWarmup Problems