# Domain Management - [[Sender Policy Framework (SPF)|SPF]] - [[DomainKeys Identified Mail (DKIM)|DKIM]] - [[Domain-Based Message Authentication, Reporting and Conformance (DMARC)|DMARC]] - [[Enforcing Mail Server TLS Connections Using MTA-STS|MTA-STS]] ## Tools - [[Inadyn DDNS]] - Easily manage DNS records using StackExchange's [DNSControl](https://github.com/StackExchange/dnscontrol) - Online DNS lookups: https://www.nslookup.io - [Hardenize](https://www.hardenize.com/) will run various reports on your domain and give security suggestions