Details
Sender Identification (SID) is an email antispam sanitization process. Sender ID uses DNS MX record lookups to verify the Simple Mail Transfer Protocol (SMTP) sending server is authorized to send email for the originating domain.
Failure to implement Sender ID risks that spam could be admitted into the email domain that originates from rogue servers. Most spam content originates from domains where the IP address has been spoofed prior to sending, thereby avoiding detection. For example, messages with malformed or incorrect ‘purported responsible sender’ data in the message header could be (best case) created by using RFI noncompliant software but is more likely to be spam.
Solution
Open the Exchange Management Shell and enter the following command:
Set-SenderIdConfig -SpoofedDomainAction Reject
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Windows.
References
- 800-53|SI-8(2)
- CAT|II
- CCI|CCI-001308
- Rule-ID|SV-221242r612603_rule
- STIG-ID|EX16-ED-000430
- STIG-Legacy|SV-95275
- STIG-Legacy|V-80565
- Vuln-ID|V-221242