Mail Exchange Security

Noun · Security & Infosec

Definitions

  1. The protection of the infrastructure and configuration involved in routing email between domains, including MX records, mail gateways, TLS settings, anti-spoofing controls, and relay policies. Weak mail exchange security can enable interception, spoofing, open relay abuse, or delivery manipulation.

    In plain English: Security for the systems and settings that route email between domains.

    Example: "The team hardened mail exchange security by locking down MX failover hosts and enforcing stricter SMTP relay rules."

Related Terms