An engineer wants to configure a method to verify the authenticity of emails on cisco ESA and noticed the sender policy framework.
How can the SPF help in that task?
A . SPF allows the sender to sign the email using preshared key
B . SPF allows the sender to sign the email using public key
C . SPF allow the owner of internal domain to use DNS record which machines are
D . The list of authorized sending hosts for a domain is published in the Domain Name System (DNS) records for that domain in the form of a specially formatted TXT record
Answer: B