What it does
Mailhardener Tools inspects MX, SPF, DKIM, DMARC, MTA-STS, TLS reporting, BIMI and DANE configuration.
Choose the validator for the record or policy being changed. The DKIM validator takes the full public-key address, selector._domainkey.domain, and checks the published record against its stated RFCs. MTA-STS checks both DNS settings and the policy server. For a long TXT value, the splitter produces 255-character parts, offers a quoted format for Google Cloud DNS or Route53, and copies the result to the clipboard. These are configuration and text-preparation workflows; receiver-reported DKIM/SPF results and continuous monitoring belong to the separate Mailhardener dashboard. Review generated records against the domain’s actual mail flow before publishing.
Strengths
- Record and policy-server validation tools
Sources
- Mailhardener email tools (Oct 26, 2026)
- Mailhardener DKIM record address and scope (Oct 26, 2026)
- Mailhardener TXT splitter format/output (Oct 26, 2026)