This reminded me of: https://github.com/ajgon/self-hosted-mailserver/blob/master/docs/my-first-5-minutes-on-a-server-or-essential-security-for-linux-servers.md

This reminded me of: https://github.com/ajgon/self-hosted-mailserver/blob/master/docs/my-first-5-minutes-on-a-server-or-essential-security-for-linux-servers.md https://github.com/ajgon/self-hosted-mailserver/blob/master/...