redzilla
All tools

IP Addressing

Layer 2

Cabling

Performance

Wireless

CCTV

Optical fiber

Power

Datacenter

AV

Voice

Diagnostics

Calculation

Security

Diagnostics

SPF / DKIM / DMARC

Enter a domain and I look up its SPF, DMARC and DKIM records (TXT) over DNS-over-HTTPS, explaining the policy (p=none/quarantine/reject), the mechanisms and whether they are well formed.

Just the domain (no http:// or @). I look up SPF, DMARC and, if you give a selector, DKIM.

DKIM lives at <selector>._domainkey.<domain>. Without a selector there is no way to guess it.

TXT queries are resolved over Cloudflare's DNS-over-HTTPS (1.1.1.1) via HTTPS; they never pass through any redzilla server. The analysis and explanation run in your browser.

redzilla.cl — mailauth 
 
  
 
 SPF — 
 
 DMARC — 
 
 DKIM — 
 
  
 
SPF · v=spf1
 
 
 
  
MechanismQualifierValueEffect
   
 
 
 
  
 
DMARC · v=DMARC1
 
 
 
  
TagValueMeaning
   
 
 
 
  
 
DKIM · 
 
 
 
  
TagValueMeaning
   
 
 
 
 
 
 
Queries over DNS-over-HTTPS (Cloudflare) · the analysis runs locally in your browser.
    
 Was this tool useful? 
      
   
 
 
 Disclaimer We take great care to keep every tool accurate and review it thoroughly; even so, we can't guarantee it is free of errors or take responsibility for how the results are used. We recommend double-checking anything critical. 
 Found an error? Let us know →