Q51.Which satement about SMTP authentication in a Cisco ESA deployment is true?

Q51.Which satement about SMTP authentication in a Cisco ESA deployment is true?
A . If an authenticating user belongs to more than on LDAP group, each with different user roles, AsyncOS grants permissions in accordance with the least restrictive user role.
B . The LDAP servers used by an ESA must share a single SMTP authentication profile
C . Clients can be authenticated with an LDAP bind or by fetching a passphrase as an attribute.
D . It enables users at remote sites to release email messages from spam quarantine.
E . When SMTP authentication with forwarding is performed by a second SMTP server, the second server also performs the transfer of queued messages.
F . It enables users at remote sites to retrieve their email messages via secure client

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Answer: C