Checkers

• HTML email check
• A ESLint plugin to lint and fix inline scripts contained in HTML files
• HTML Validator - Linter
• EmailQo Email Infrastructure Grader - Free tool to check SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required.
• ReviewMyDNS - A simple, plain-English checker for SPF, DKIM, and DMARC records.