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XCCDF
Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide
SRG-APP-000247
SRG-APP-000247
An XCCDF Group - A logical subset of the XCCDF Benchmark
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SRG-APP-000247
1 Rule
<GroupDescription></GroupDescription>
The Exchange Outbound Connection Limit per Domain Count must be controlled.
Low Severity
<VulnDiscussion>Email system availability depends in part on best practice strategies for setting tuning configurations. This configuration controls the maximum number of simultaneous outbound connections from a domain as a delivery tuning mechanism. If the limit is too low, connections may be dropped. If the limit is too high, some domains may use a disproportionate resource share, denying access to other domains. Appropriate tuning reduces risk of data delay or loss. By default, a limit of 20 simultaneous outbound connections from a domain should be sufficient. The value may be adjusted if justified by local site conditions.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>