What kind of information about your e-mail environment is not stored in DNS?

What kind of information about your e-mail environment is not stored in DNS?

• Certificate expiration date
• SPF record
• DKIM selector
• MX 

 

EXPLANATION

Autodiscover records, MX records and DKIM selectors are provided in de public DNS zone for each domain. The expiration date for a certificate is displayed on the certificate itself.

SOURCE

https://nl.wikipedia.org/wiki/Domain_Name_System