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shankar-bavan/DKIM-SPF-DMARC-check-via-command-line.md

Created December 25, 2022 14:26
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DKIM, SPF, and DMARC check via command line
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DKIM-SPF-DMARC-check-via-command-line.md

SPF record check

  • Open the command line (Start > Run > cmd).
  • Enter nslookup -type=txt followed by a space and a domain or hostname, for example, nslookup -type=txt google.com.
  • If an SPF record exists, the result will be something like this: v=spf1 include:_spf.google.com ~all.
  • If there are no results or no v=spf1, then there is a problem getting the record for the domain, or it doesn’t exist.

DKIM record check

  • Open the command line (Start > Run > cmd).
  • In the command window, type nslookup > Enter.
  • Type set q=txt > Enter.
  • Type selector._domainkey.domain.com > Enter.

DMARC policy check

  • Open the command line (Start > Run > cmd).
  • Type nslookup -type=txt _dmarc.domain.com, for example, nslookup -type=txt _dmarc.google.com, > Enter.
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