host.tools

Email auth all-in-one

Email /api/v1/email/auth

SPF + DKIM + DMARC + BIMI + MTA-STS + TLS-RPT in a single shot.

Try: host.com google.com checkhost.com hostinfo.com [email protected]
Related: DNS lookup (dig) DNS propagation Domain WHOIS SSL certificate inspector HTTP headers Security headers grader MX lookup SPF tester DMARC tester

Email auth report — cloudflare.com

SPF

present

Sender Policy Framework — declares which IPs can send for the domain

v=spf1 ip4:199.15.212.0/22 ip4:173.245.48.0/20 include:_spf.google.com include:spf1.mcsv.net include:spf.mandrillapp.com include:mail.zendesk.com include:stspg-customer.com include:_spf.salesforce.com -all

DMARC

present

Domain-based authentication policy + reporting

v=DMARC1; p=reject; pct=100; rua=mailto:[email protected],mailto:[email protected]

DKIM

present

Cryptographic per-selector signing (auto-probed: default, google, selector1/2)

1 selector(s)

["k1"]

BIMI

present

Brand Indicators for Message Identification (logo)

v=BIMI1; l=https://www.cloudflare.com/cloudflare_1171114652.svg; a=https://www.cloudflare.com/cloudflare_1171114652.pem

MTA-STS

missing

TLS for SMTP enforcement policy

TLS-RPT

missing

Aggregated TLS failure reports

How to use Email auth all-in-one
  1. 1
    Paste your input

    Enter the value at the top — domain, IP, URL, email, ASN, hash, whatever fits this tool. The smart input auto-detects type.

  2. 2
    Click "Inspect"

    host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.

  3. 3
    Open the API tab

    Every web tool has a sibling /api/v1/email/auth JSON endpoint with the same payload. One copy-as-curl click and you're scripting it.

Why this matters

SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT — six little records decide whether your mail lands in the inbox or the spam folder. Get them right once, sleep better forever.

API equivalent
/api/v1/email/auth?q=cloudflare.com 
curl -s '/api/v1/email/auth?q=cloudflare.com'
Embed this tool
<iframe src="/email/auth?q={INPUT}&embed=1"
  width="100%" height="600" frameborder="0"></iframe>

Drop into any HTML page. The embed=1 flag hides nav and footer.

FAQ · Email auth all-in-one

Common questions

Is Email auth all-in-one free?
Yes — every tool is free on the web with a 200/hour rate limit per IP. The matching API endpoint /api/v1/email/auth is free up to 100 requests/hour, no key required.
Where does the data come from?
Real-time probes against authoritative sources (DNS root, RIRs, registries, the target server itself), plus partner data feeds from hostinfo.com (GeoIP/ASN) and hostcheck.com (reputation).
How fresh are the results?
Live by default. Cached for 5 minutes to make repeat queries instant; pass ?nocache=1 for a forced refresh.
Can I run this from the command line?
Yes — every tool ships with a copy-as-curl. There's also an official CLI: host.tools email auth YOUR_INPUT.
Can I monitor results over time?
Pro tier lets you schedule any tool to run every 1/5/15/60 min and alert on diff. See monitors.
host.tools Pro

Run Email auth all-in-one on a schedule. Get pinged when it changes.

Pro gets you bulk lookups, monitors, webhook alerts, history, exports and 10,000 API calls/day. $19/mo.

See pricing Tour monitors
  • ✓Schedule any tool — every 1, 5, 15, 60 min
  • ✓Diff against last run, alert on change
  • ✓Webhook + email + Slack + PagerDuty + OpsGenie
  • ✓Bulk CSV upload, 1,000 inputs per job
  • ✓Export results as CSV / NDJSON / Excel
  • ✓90-day history, comparison view