MAIL HALO
Free diagnosis

Check any domain in seconds.

SPF, DKIM, DMARC, MX, BIMI, MTA-STS and TLS-RPT lookups, blocklist checks, an email verifier, and a full report you can share.

Explore sample Invite-only ยท Sample data in preview
Tools in the Mail Halo app, with sample data
Tools in the Mail Halo app. Sample data. Select the image to view it full size.

Most sending problems start in a DNS record.

Tools runs the checks an operator would otherwise do by hand across several sites. The full deliverability report can be saved as a PDF or shared by link.

  1. Enter a domain

    Or an address, for the email verifier.

  2. Read each check

    Every record is shown with what is wrong and what it should be.

  3. Share the report

    Download the full report as a PDF or send a link.

Every check in one place.

Authentication
SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT.
Blocklists
Major domain blocklists in one lookup.
Email verifier
Check an address before you send to it.

Works together with

DoctorLanding Factory