Which difference between DomainKeys and DKIM in Cisco ESA deployment is true?
A. Only DOmain Keys support incoming-mail authentication
B. AsyncOS supports mail signing for DKIM only
C. Bounce and delay messages can use DKIM only
D. AsyncOS supports mail signing and incoming-mail authentication for DomainKeys only
E. Bounce and delay messages can use Domain Keys only
F. If DomainKeys and DKIM are associated to a mail flow AsyncOS uses only DKIM tto sign outgoing messages
G. Only DKIM supports incoming0mail verification
F
DomainKeys and DKIM signing in AsyncOS is implemented via domain profiles and enabled via a mail flow policy (typically, the outgoing “relay” policy). Signing the message is the last action performed by the appliance before the message is sent.
If you enable both DKIM and DomainKeys signing, the DKIM signature is used.
https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-0/user_guide_fs/b_ESA_Admin_Guide_11_0/b_ESA_Admin_Guide_chapter_010101.html#con_1148415