https://redsift.com/tools/investigate
DMARC, SPF & DKIM Checker | Red Sift Investigate
Run a free DMARC record lookup and check SPF/DKIM in seconds. Verify alignment, find misconfigurations, and strengthen email security with Red Sift Investigate.
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https://powerdmarc.com/dkim-record-lookup/
Free DKIM Checker Tool - Lookup And Verify DKIM Record
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https://www.mimecast.com/products/dmarc-analyzer/dkim-check/
DKIM Record Checker | Free DKIM Check | Mimecast
Mimecast’s DKIM Checker provides visibility into all email senders using your domain. Use our DKIM record checker to identify legitimate vs fraudulent senders.
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