| 1.1 Set 'Maximum send size - connector level' to '10240' | SYSTEM AND COMMUNICATIONS PROTECTION |
| 1.3 Set 'Enable Sender ID agent' to 'True' | SYSTEM AND INFORMATION INTEGRITY |
| 1.4 Set 'External send connector authentication: DNS Routing' to 'True' | SYSTEM AND COMMUNICATIONS PROTECTION |
| 1.6 Set 'Enable Sender reputation' to 'True' - OpenProxyDetectionEnabled | SYSTEM AND INFORMATION INTEGRITY |
| 1.6 Set 'Enable Sender reputation' to 'True' - SenderBlockingEnabled | SYSTEM AND INFORMATION INTEGRITY |
| 1.8 Set 'External send connector authentication: Ignore Start TLS' to 'False' | SYSTEM AND COMMUNICATIONS PROTECTION |
| 1.10 Set receive connector 'Configure Protocol logging' to 'Verbose' | AUDIT AND ACCOUNTABILITY |
| 1.11 Set send connector 'Configure Protocol logging' to 'Verbose' | AUDIT AND ACCOUNTABILITY |
| 1.12 Set 'External send connector authentication: Domain Security' to 'True' | SYSTEM AND COMMUNICATIONS PROTECTION |
| 1.16 Set 'Turn on Connectivity logging' to 'True' | AUDIT AND ACCOUNTABILITY |
| Authentication Failure | |
| CIS_Microsoft_Exchange_Server_2016_Level_1_Edge_v1.0.0.audit from CIS Microsoft Exchange Server 2016 v1.0.0 Benchmark | SYSTEM AND INFORMATION INTEGRITY |
