Troubleshooting low email engagement for B2B content marketing involves a multifaceted approach encompassing technical setup, audience understanding, content optimization, and deliverability monitoring. Technically, verifying proper email authentication (SPF, DKIM, DMARC), maintaining a positive sender reputation, and setting up feedback loops with ISPs are crucial. Understanding the audience involves segmenting lists based on demographics, industry, job function, and engagement, while also ensuring data validity and relevance. Content should be engaging, personalized, valuable, and mobile-optimized, with clear call-to-actions, and optimized through A/B testing. Determining if the problem is technical deliverability or recipient disinterest is key. Monitoring and analyzing delivery patterns, identifying potential filtering issues, and continuously refining strategies based on results are also important.