email-deliverabilitylisted

# Email Deliverability ## Overview This skill covers B2B email deliverability best practices spanning cold outbound infrastructure, opted-in marketing programs, technical configuration, engagement signals, and metric interpretation. All practices are sourced exclusively from Exit Five podcast guests across 6 episodes. Do not supplement with general knowledge not represented here — gaps in coverage are intentional. --- ## Infrastructure: Domains, IPs, and Inboxes **Protect your primary domain at all costs.** - Never send cold outbound email from your primary company domain (e.g., `yourcompany.com`). Use secondary domains (e.g., `try.exitfive.com`, `get.exitfive.com`) instead. If the primary domain is blacklisted, it damages your entire business's email deliverability. (Source: Alex Fine, Episode #256) - Use secondary domains rather than subdomains for email campaigns. Subdomains are tied to your primary domain's reputation; secondary domains are fully isolated. (Source: Alex Fine, Episode #256) - Limit to three email inboxes per domain maximum. If a domain develops a poor reputation, all inboxes on it are at risk. Spreading inboxes across multiple domains (max 3 per domain) diversifies that risk. (Source: Alex Fine, Episode #256) - Use real people's names in email addresses (e.g., `dan@domain.com`), not aliases like `sales@domain.com` or fake names. Real names allow recipients to verify the sender on LinkedIn and reduce spam filter triggers. (Source: Alex Fine, Episode #2