Tagged: SMTP security
Email AuthenticationSTARTTLS upgrades a plaintext SMTP connection to encrypted TLS mid-session — but its opportunistic nature leaves a gap. Learn how it works, where it fails, and how to enforce it properly with MTA-STS.
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SMTP & InfrastructureA misconfigured SMTP server can be exploited as an open relay, used to send spam from your domain, or damage your sending reputation in ways that take weeks to repair. This practical hardening checklist covers open relay prevention, TLS enforcement, rate limiting, authentication requirements, and the ongoing monitoring that keeps your mail server secure long-term.
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SMTP & InfrastructureAn exposed or misconfigured SMTP server is an open invitation for relay abuse, credential attacks, and spam injection. This checklist covers the specific hardening steps every mail administrator should complete before a server handles real traffic.
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