DKIM Record for SmaterMail
Record name: Unique-Number._domainKey
Type: TXT
Value:
"v=DKIM1; k=rsa; Auto Generated from SmaterMail"


DKIM Record for Cpanel
Record name: default._domainKey
Type: TXT
Value:
"Auto Generated by cpanel"


DMARC
Record name: _dmarc
Type: TXT
Value: "v=DMARC1; p=reject; rua=mailto:admin@DOMAINNAME; ruf=mailto:admin@DOMAINNAME; sp=reject; aspf=s; adkim=s; ri=86400"

DMARC record check

https://www.dmarcanalyzer.com/dmarc/dmarc-record-check/