// REFERENCE

SMIMEA record

Type number: 53

SMIMEA associates an S/MIME certificate with an email address in DNS (like TLSA but for email), to discover and verify the recipient's key. It relies on DNSSEC.

Related tools

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Related

mx
MX record spf
SPF record (in TXT) dkim
DKIM record (in TXT) dmarc
DMARC record (in TXT) openpgpkey
OPENPGPKEY record

Types per the IANA DNS parameters registry and their RFCs. Educational content.