Security & Infrastructure Hardening

Locking the engine room door." This section covers the server-level security (beyond just authentication) needed to protect your infrastructure, such as SSL/TLS certificates, port security, and preventing header injection attacks.

12 questions in this topic

What are inbound vs outbound filters in ESPs? How do ESPs prevent account compromise or abuse? What is SMTP AUTH and why is it important? What is rate limiting per account or token? How do ESPs detect and block spam campaigns internally? What is anomaly detection in email traffic? What is encryption in transit (TLS) and at rest? How do ESPs handle sensitive data storage? What’s the difference between opportunistic and enforced TLS? What is DANE and how does it relate to MTA-STS? How do ESPs verify webhook and API integrity? How can senders audit security in ESP dashboards?

Questions about Security & Infrastructure Hardening