Domain Health Checker
Run a 360° DNS and authentication health audit for your sending domain.
Checking mail servers...
Evaluating DNS lookups & qualifiers...
Scanning default selectors (google, selector1)...
Auditing policy tag (p=reject / quarantine)...
Checking default._bimi TXT record & VMC certificate...
Checking in-transit SMTP encryption policy...
- Your SPF record uses
~all(SoftFail). Upgrade to-allonce sending IPs are fully aligned. - DMARC policy is currently set to
p=reject, which satisfies Google & Yahoo 2024+ sender mandates.
How It Works in 3 Simple Steps
Enter sending domain
Type your sending domain (e.g. yourcompany.com or outbound-company.com).
Live DNS Query
Our engine queries authoritative DNS servers live to verify MX, SPF, DMARC and security flags.
Get Fixes & Score
Inspect your health score (0-100), warnings, and copy-paste ready DNS records.
- Keep DNS lookups in SPF under the 10-query limit.
- Always set up Google Postmaster Tools on primary and secondary sending domains.
- Never send cold emails from your primary corporate domain without secondary domains.
Frequently Asked Questions
Google and Yahoo enforce strict email authentication rules. Missing SPF or DMARC causes messages to be throttled or dumped into spam.
No, this tool performs pure DNS lookups and checks public authentication records without sending any test emails.
A healthy sending domain should score 90+ with valid MX, a strict SPF record, aligned DKIM, and at least p=quarantine or p=reject on DMARC.