SOC 2 Type II
SOC 2 Type II audits evaluate an organization's controls over a period of time against the Trust Services Criteria. Email authentication protocols like SPF, DKIM, and DMARC directly support the Security principle (CC6.x) by preventing unauthorized use of your domain in email communications. TLS encryption satisfies multiple criteria under Availability and Confidentiality. While SOC 2 does not prescribe specific email technologies, auditors routinely look for evidence that organizations have implemented industry-standard email authentication to mitigate spoofing and phishing risks.
| Protocol | Requirement | Details |
|---|---|---|
| SPF | Recommended | SPF records help satisfy CC6.1 (logical access controls) by restricting which servers can send email on behalf of your domain. Auditors view SPF as a standard control for preventing domain spoofing. |
| DMARC | Recommended | DMARC enforcement aligns with CC6.6 (security measures against threats outside the system boundary) and CC7.2 (monitoring for anomalies). A DMARC policy of p=reject or p=quarantine demonstrates proactive threat mitigation. |
| DKIM | Recommended | DKIM signing supports CC6.1 by providing cryptographic proof that emails originated from authorized senders and have not been tampered with in transit. |
| SSL/TLS | Required | TLS encryption is expected under CC6.1 (encryption in transit) and CC6.7 (restricting the transmission of data). SOC 2 auditors will flag any endpoints serving unencrypted traffic as a control deficiency. |
| Security Headers | Recommended | Security headers like HSTS, Content-Security-Policy, and X-Frame-Options support CC6.1 by hardening web applications against common attack vectors. Auditors assess these as part of the overall security posture. |
| DNSSEC | Optional | DNSSEC is not commonly assessed in SOC 2 audits, but it strengthens the integrity of DNS responses and can support the Security principle by preventing DNS hijacking attacks. |
Publish an SPF record listing all authorized sending sources. Configure DKIM signing for your mail servers and third-party senders. Deploy a DMARC policy starting with p=none to monitor, then advance to p=quarantine or p=reject once legitimate traffic is accounted for.
Ensure all web-facing endpoints use TLS 1.2 or higher. Obtain valid SSL certificates from a trusted CA, configure HSTS to enforce HTTPS, and disable legacy protocols (SSLv3, TLS 1.0, TLS 1.1).
Add Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Strict-Transport-Security, and Referrer-Policy headers to all web responses. Test headers using Domain Security Scanner to verify correct implementation.
Create formal documentation covering your email authentication configuration, responsible parties, change management procedures, and incident response for email-based threats. This documentation will be reviewed during the SOC 2 audit.
Run regular domain security scans and export PDF reports showing SPF, DKIM, DMARC, TLS, and security header grades. These reports serve as point-in-time evidence of control effectiveness during the audit period.
Enable domain monitoring to receive alerts if any email authentication records change or degrade. SOC 2 Type II evaluates controls over a period (typically 6-12 months), so continuous monitoring demonstrates sustained compliance.
Use Domain Security Scanner reports as evidence for your SOC 2 audit. Pro and Agency plans include PDF export for compliance documentation.
Run a free scan to see how your domain's email authentication measures up against SOC 2 requirements.
DMARC is not explicitly mandated by the SOC 2 Trust Services Criteria, but it is strongly recommended. Auditors evaluate whether organizations have implemented reasonable controls to prevent email-based threats. DMARC has become an industry-standard control, and its absence may result in auditor inquiries or management letter comments about gaps in email security.
Email authentication primarily maps to the Security principle: CC6.1 (logical access controls and encryption), CC6.6 (measures against threats from outside the system boundary), and CC7.2 (monitoring for anomalies). TLS encryption also supports the Confidentiality principle (C1.1) and can relate to Availability (A1.2) when email is a critical communication channel.
Yes. PDF scan reports showing your domain's email authentication grades serve as point-in-time evidence of control effectiveness. For SOC 2 Type II, you should generate reports at regular intervals throughout the audit period. Pro and Agency plans include PDF export with timestamps, which auditors can reference alongside your control documentation.