300-720 Exam Dumps : Securing Email with Cisco Email Security Appliance (300-720 SESA)

The maximum attachment size to scan is a configuration on the scan behavior that determines the maximum size of an attachment that Cisco ESA will scan for viruses and malware. If an attachment exceeds this size, Cisco ESA will apply the configured action for unscannable messages, such as deliver, drop, or quarantine.

To allow the attachment to be scanned on the Cisco ESA, this configuration must be updated to a larger value than the attachment size, which is 10 MB according to the message header.

The other options are not valid configurations to allow the attachment to be scanned on the Cisco ESA, because they do not affect the maximum attachment size to scan.

References: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 7-3 and page 7-4.

Overview of Encrypting Communication with Other MTAs:

AsyncOS supports the STARTTLS extension to SMTP (Secure SMTP over TLS).

The TLS implementation in AsyncOS provides privacy through encryption.

To encrypt SMTP with TLS on a Cisco Secure Email Gateway appliance when the sender requires TLS verification, the components that are required are an X.509 certificate and matching private key from a CA. The certificate must be signed by a trusted CA and contain the domain name or IP address of the listener in the Subject or Subject Alternative Name fields. The private key must be unencrypted and match the certificate. References: [Cisco Secure Email Gateway Administrator Guide - Configuring TLS]