This file is indexed.

/usr/share/pki/ca/emails/certIssued_RA is in pki-ca 10.6.0-1ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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Your certificate request has been processed successfully.
SubjectDN= $SubjectDN
IssuerDN= $IssuerDN
notAfter= $NotAfter
notBefore= $NotBefore
Serial Number= 0x$HexSerialNumber

To get your certificate, please follow this URL:
https://$HttpHost:$HttpPort/displayCertFromRequest?requestId=$RequestId

Please contact your admin if there is any problem.
And, of course, this is just a \$SAMPLE\$ email notification form.