Microsoft Exchange 2016 Edge Transport Server Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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Exchange external Receive connectors must be domain secure-enabled.
The Simple Mail Transfer Protocol (SMTP) connector is used by Exchange to send and receive messages from server to server. Several controls work together to provide security between internal server...Rule Medium Severity -
Exchange Connectivity logging must be enabled.
A connectivity log is a record of the SMTP connection activity of the outbound message delivery queues to the destination mailbox server, smart host, or domain. Connectivity logging is available on...Rule Medium Severity -
Exchange Queue monitoring must be configured with threshold and action.
Monitors are automated "process watchers" that respond to performance changes and can be useful in detecting outages and alerting administrators where attention is needed. Exchange has built-in mon...Rule Medium Severity -
Exchange audit data must be protected against unauthorized access for modification.
Log files help establish a history of activities and can be useful in detecting attack attempts or determining tuning adjustments to improve availability. Audit log content must always be considere...Rule Medium Severity -
Exchange audit data must be protected against unauthorized access for deletion.
Log files help establish a history of activities and can be useful in detecting attack attempts or determining tuning adjustments to improve availability. Audit log content must always be considere...Rule Medium Severity -
Exchange Internet-facing Send connectors must specify a Smart Host.
When identifying a "Smart Host" for the email environment, a logical Send connector is the preferred method. A Smart Host acts as an Internet-facing concentrator for other email servers. Appropria...Rule Medium Severity -
Exchange Internet-facing Receive connectors must offer Transport Layer Security (TLS) before using basic authentication.
Sending unencrypted email over the Internet increases the risk that messages can be intercepted or altered. TLS is designed to protect confidentiality and data integrity by encrypting email message...Rule Medium Severity -
Exchange Send connectors delivery retries must be controlled.
This setting controls the rate at which delivery attempts from the home domain are retried and user notifications are issued and notes the expiration time when the message will be discarded. If ...Rule Low Severity -
Exchange Receive connectors must control the number of recipients per message.
Email system availability depends in part on best practice strategies for setting tuning configurations. This configuration controls the maximum number of recipients who will receive a copy of a ...Rule Medium Severity -
Exchange filtered messages must be archived.
By performing filtering at the perimeter, up to 90 percent of spam, malware, and other undesirable messages are eliminated from the message stream rather than admitting them into the mail server en...Rule Medium Severity
Node 2
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