[enhancement]: Add CAA record to the DNS

[marcoxyz123]

Which feature or improvement would you like to request?

Also add the CAA records for technical Domains:

mail.example.com. IN CAA 0 issue "letsencrypt.org" or example.com IN CAA 0 issuewild "Entrust.net"

for policy violations reporting (not all CA supporting this but letsencrypt does)

mail.example.com. IN CAA 0 iodef "mailto:[email protected]"

Best regards, Marco

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