A high bounce rate can have multiple negative impacts on your email marketing efforts. It can: - Damage Sender Reputation: ISPs and email providers monitor bounce rates. High bounce rates can lead to your emails being marked as spam. - Waste Resources: High bounce rates mean that your marketing efforts, time, and resources are being wasted on undeliverable emails. - Skew Metrics: Bounce rates can distort your email campaign metrics, making it difficult to gauge the true effectiveness of your strategy.