The Email Host Checker is a web-based analysis tool for evaluating the DNS and configuration of a domain’s email infrastructure. It checks all key email-related records and characteristics to provide a clear picture of security, deliverability, and overall configuration quality.Purpose and Use Cases#
The tool is designed to answer whether a domain is properly configured to send and receive email securely and reliably. Typical use cases include onboarding new domains to an email provider, auditing existing setups, troubleshooting delivery problems, and validating changes to authentication records.By centralizing all critical checks in one interface, it helps teams quickly identify misconfigurations such as missing SPF, incorrect DKIM keys, weak DMARC policies, or broken MX and PTR records.Users provide a domain name and, optionally, a DKIM selector to start the analysis. The tool then performs a series of DNS and connectivity checks related to email security, branding, verification, and server availability, summarizing the findings per category.This flow allows both quick one-off checks and deeper investigations when issues are discovered during deployment, migration, or incident response.The Email Host Checker performs a wide range of checks, each focused on a specific aspect of email configuration. These include SPF, DMARC, DKIM, MX records, PTR, BIMI, Google verification, deliverability, disposable-domain detection, MX validation, DNS propagation, and an aggregate security score.Each category highlights whether the configuration is present, valid, and aligned with best practices, making it easier to prioritize remediation work.Audience and Role in the Suite#
The tool is aimed at administrators, email engineers, security teams, and developers responsible for domain and email configuration. It forms a core part of the broader Check My DNS toolkit, complementing generic DNS lookups with specialized insight into email-specific posture and readiness. Modified at 2026-02-07 14:18:30
