Key capabilities
- Follow include and redirect with cycles and the 10-lookup budget
- Validate DMARC enforcement, percentage and reporting
- Decode explicit DKIM selectors and public-key strength
- Check MX, MTA-STS, TLS-RPT, TLSA, CAA and BIMI
Email Domain Security & Deliverability Checker
Query live SPF, DMARC, selected DKIM keys, MX, TLS-RPT, TLSA, CAA, BIMI and MTA-STS with bounded recursion.
Live public-record check
Only the domain and selectors are sent to query DNS and the fixed MTA-STS policy path.
Enter an organizational or sending domain, not an email address.
Selectors cannot be reliably discovered; enter sender-configured values separated by commas.
At most 10 selectors, 25 SPF nodes and 8 MX TLSA lookups.
About Email Domain Security & Deliverability Checker
Audit mail DNS policies and transport protections. Query live SPF, DMARC, selected DKIM keys, MX, TLS-RPT, TLSA, CAA, BIMI and MTA-STS with bounded recursion.
Useful for
- Validate a sending domain
- Review authentication enforcement gaps
- Audit protection during provider migration
Frequently asked questions
Is Email Domain Security & Deliverability Checker free to use online?
Yes. Email Domain Security & Deliverability Checker opens in a modern browser and does not require desktop software installation.
What is Email Domain Security & Deliverability Checker useful for?
Common use cases include Validate a sending domain; Review authentication enforcement gaps.
Does this tool make network connections?
Some Email Domain Security & Deliverability Checker features need to connect to a target service or load online data. Follow the page guidance and access only resources you are authorized to use.
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