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Check a domain's DKIM key in DNS

harmlessDNSdebian, ubuntu
Adjust the values, the command updates live
user@server
dig +short default._domainkey.example.com TXT

Prints the TXT record with the public DKIM key, starting with v=DKIM1. If the output is empty, recipients cannot verify the signature. The selector is shown in the s= field of the DKIM-Signature header of a sent message, Plesk uses default by default.

Note: Long keys are printed split into several strings, which is correct.

Also searched as

  • check dkim record
  • dkim fail cause
  • plesk dkim key in dns

Related one-liners

All in DNS

Look up the MX records of a domain

$dig +short example.com MX
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Look up the reverse DNS (PTR) of an IP address

$dig +short -x 203.0.113.10
harmlessDNS

Show the DMARC policy of a domain

$dig +short _dmarc.example.com TXT
harmlessDNS

Show the SPF record of a domain

$dig +short example.com TXT | grep -i "v=spf1"
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Verify reverse DNS of a mail server IP (FCrDNS)

$ptr=$(dig +short -x 203.0.113.10 | head -n 1); echo "PTR: $ptr"; dig +short "$ptr" A
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Check DNS propagation across public resolvers

$for ns in 1.1.1.1 8.8.8.8 9.9.9.9 208.67.222.222; do echo "$ns: $(dig +short @$ns example.com A | tr '\n' ' ')"; done
harmlessDNS

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