What does a good email security program mean to you?

Web: https://www.reddit.com/r/cybersecurity/comments/11u3bwl/what_does_a_good_email_security_program_mean_to/

I hear about many domains of security but rarely about email security. I'm curious what everyone is doing for email security?

Idea's I've seen/used:

* Use secure protocols (SSL/TLS)
* Security awareness training (phishing, social engineering, etc..)
* Enabling SPF, DKIM, and DMARC for outbound security...having a tool provide stats on how you're and when things look odd
* Spam/phishing filtering
* DLP

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