Troubleshooting soft bounce issues with Yahoo/VZG involves a multi-faceted approach. Experts and marketers emphasize list hygiene (removing inactive addresses, segmenting based on engagement), content optimization (avoiding spam triggers), infrastructure setup (proper authentication, reverse DNS), reputation monitoring (IP and domain), understanding Yahoo/VZG's specific policies (throttling, greylisting), server configuration (retries), and infrastructure review (CDNs). Documentation highlights analyzing SMTP codes, monitoring bounce rates, and leveraging 'mailbox full' indicators for list cleaning. A combination of these strategies helps pinpoint and resolve the reasons Yahoo/VZ temporarily rejects mail.