Q37
Do you have a current SOC 2 Type II report?
Postmark's data center (Deft, a DuPont Fabros facility) is SOC 2 Type 2 accredited as confirmed on their support article.
Postmark Vendor Risk Assessment — Full Report
Before you share customer data with Postmark, your compliance team needs documented proof they can be trusted. ThirdProof investigated Postmark across 27 intelligence sources — here's what we found.
⚠ FedRAMP Status: Not found in the FedRAMP Marketplace. Vendors handling government data or CUI must be FedRAMP authorized.
Risk Tier
Tier 3 — Moderate RiskSOC 2
✓ VerifiedFedRAMP
— Not AuthorizedLast Assessed
Mar 25, 2026🟢IP Reputation: Abuse score: 0%, 0 reports🟡SSL/TLS: TLSv1.3🟢Domain Age: 16.8 years🟢Infrastructure: 13 open ports, 0 CVEs
- FedRAMP Status
- Postmark is not listed on the FedRAMP Marketplace as of March 2026.
- SOC 2 Status
- Postmark has not had a SOC 2 claim detected on their trust page.
- Sanctions Screening
- Postmark returned no matches in OFAC SDN, EU Consolidated, and UN sanctions screening.
- Risk Tier
- ThirdProof assigned Postmark a Moderate Risk tier with 90% confidence across 27 intelligence sources.
24 sources queried. 90% confidence. Every Postmark investigation produces both a risk report and an auto-filled security questionnaire — no vendor follow-up required.
Get Postmark's Full Report Free →5 free investigations|Risk report + auto-filled questionnaire|Avg. 7 minutes
Certification & Compliance Status
Security Questionnaire — Auto-Filled
39 of 133 questions answered for Postmark
Auto-filled from public evidence • 29% complete
Q38
Do you have ISO 27001 certification?
Postmark does not claim ISO 27001 certification; their DPA only references AWS compliance programs which include ISO certifications, not Postmark's own ISO 27001.
Q41
Are you FedRAMP authorized? At what level?
Not found in FedRAMP marketplace
Source: External Automedium confidence
Q40
Are you HIPAA compliant? Do you sign BAAs?
Postmark explicitly states they are not HIPAA-compliant and will not sign Business Associate Agreements.
Q42
Are you GDPR compliant? Do you have a DPA available?
Postmark provides a Data Processing Addendum (DPA) and has detailed GDPR compliance documentation with appropriate technical and organizational measures.
+ 4 more compliance questions answered in the full report
Every investigation produces a full PDF report plus the complete 133-question questionnaire, mapped to SOC 2, HIPAA, PCI DSS, SIG, and more.
Get Postmark's Full Report Free →✗Not Listed on FedRAMP Marketplace
Verified against FedRAMP Marketplace API as of March 2026
Organizations with federal compliance requirements should verify this directly at marketplace.fedramp.gov.
Postmark is not listed on the FedRAMP Marketplace.
◇27 data sources queried per assessment
◷Reports generated in an average of 7 minutes
◈SHA-256 verified for audit integrity
✓Deterministic risk scoring — no AI guesswork
3Tier
Moderate Risk
Postmarkapp
Vendor Risk Assessment
Confidence Score90%
Based on data availability and source coverage
24
Sources Queried
23
Sources With Data
March 25, 2026
Last Assessed
Executive Summary
AI-generated analysis for Postmarkapp
Postmark (postmarkapp.com) is an established transactional and marketing email delivery service with a 16-year operational history, assessed at Tier 3 (Moderate Risk) with a 90% confidence score. This rating reflects a combination of strong foundational signals alongside notable transparency gaps that warrant structured follow-up before onboarding at medium data access levels. Postmark demonstrates several meaningful positive signals:
Key Findings
- A clean domain reputation with no listings on SURBL, Spamhaus DBL, or URLhaus malware databases
- Zero abuse reports on its primary IP address and no threat intelligence pulses in open exchange databases
- A 16-year domain registration history managed through enterprise registrar MarkMonitor, with domain expiry secured through 2028
- Infrastructure delivered via Cloudflare CDN with a valid TLS 1.3 certificate using strong AES-256-GCM-SHA384 cipher configuration
- Clean results across Malware detection service, website security scanning, and historical adverse media searches
- No sanctions matches across OFAC, EU, or UN watchlists, and no SEC or FDIC enforcement findings Several transparency and security posture gaps were identified that require attention:
- No publicly accessible trust center, compliance documentation page, or subprocessor list was found, which limits independent supply chain and certification verification
- No compliance certifications (SOC 2, ISO 27001, HITRUST, PCI DSS, or FedRAMP) were independently confirmed through registry verification or vendor trust page; a possible HITRUST directory match was identified but could not be confirmed due to insufficient match context
- The vendor's marketing website received a C- grade (45/100) from HTTP security header analysis, with Content-Security-Policy and X-Frame-Options headers absent
- No publicly accessible AI data usage policy was found, which is a concern for any vendor processing customer content in an AI-adjacent email delivery workflow
- 13 open ports were detected on the vendor's infrastructure, which sits at the upper end of typical SaaS exposure and warrants review Overall, Postmark presents as a technically mature, long-established email delivery platform with a clean external threat profile.
Area Requiring Attention
However, the absence of independently verifiable compliance documentation and supply chain transparency places this assessment at Tier 3, requiring conditional approval with specific documentation requests prior to production use.
Independence Statement
All evidence in this report was independently sourced from external registries, threat intelligence feeds, and public data sources without vendor participation or notification.
Investigation Findings
7 findings identified for Postmarkapp
6 medium1 low
medium
Adverse Media Scan Unavailable
A critical data source was unavailable during this investigation. Manual verification is recommended.
Source:Adverse Media Scan (Fallback)
medium
Missing Security Headers
postmarkapp.com is missing 2 recommended security headers: Content-Security-Policy, X-Frame-Options.
Source:Domain Analysisdns.google →
medium
HTTP Security Grade: C-
postmarkapp.com received a mediocre grade (C-). Some security headers are configured but improvements are needed.
medium
Multiple Certificate Issuers (24)
postmarkapp.com has certificates from 24 different Certificate Authorities. This may indicate inconsistent certificate management practices.
medium
No Public Subprocessor Page Found
No accessible subprocessor page was found for postmarkapp.com. GDPR Article 28 requires data processors to maintain a list of subprocessors. Vendors with mature data governance typically publish this list.
medium
AI Data Usage Policy Not Discoverable at Standard Paths
An AI-specific data usage policy was not discoverable for postmarkapp.com through automated scanning of common policy paths and web search. The vendor may publish relevant data handling commitments in enterprise agreement documents (DPAs, product terms, licensing portals) that are not indexed at standard public URLs. Request the vendor's Data Protection Addendum or AI-specific terms directly.
low
No Public Trust or Security Page Found
No accessible trust, security, or compliance page was found at common paths for postmarkapp.com. Vendors with mature security programs typically publish a trust center. Vendor should be asked to provide compliance documentation directly.
✓
Security Strengths
19 positive signals verified
✓
No LEI Registry Match (Expected for Most Companies)
Business Registration →✓
No Sanctions Matches Found
Sanctions & Watchlist Screening →✓
Firmographic Data Available
Company Intelligence →✓
Valid SSL Certificate
Domain Analysis →✓
13 Open Ports Detected
Infrastructure Exposure →✓
Established Domain (16+ years)
Domain Registration →✓
Clean domain reputation
Threat Intelligence →✓
No Hacker News Mentions
Tech Community Sentiment →✓
Certificate Transparency: 44 Subdomains
Certificate Transparency →✓
Established Web Presence (16+ years)
Web Archive History →✓
No Threat Intelligence Pulses
Threat Intelligence (OTX) →✓
Clean IP Reputation
IP Reputation →✓
Clean Safe Browsing Status
Malware & Phishing Check →✓
Clean Website Security Scan
Website Security Scan →✓
Not Found as FDIC-Insured Institution
FDIC Institution Check →✓
No SEC Enforcement Filings Found
SEC Filing Search →✓
No Historical Adverse Media Found
Historical Media Search →✓
HITRUST Directory Match — Manual Verification Required
Certification Registry Verification →✓
SOC 2 Compliance Not Publicly Verifiable
Certification Registry Verification →Recommended Actions
Steps to address findings for Postmarkapp
- 1
Request Postmark's SOC 2 Type II report and bridge letter — email security@postmarkapp.com or check postmarkapp.com/legal for a trust portal link. Many email delivery vendors maintain confidential trust pages accessible via NDA. Set a 20-business-day response deadline and document receipt in your vendor risk register.
- 2
Request a signed Data Protection Addendum (DPA) and subprocessor list before go-live, particularly if EU personal data will be transmitted. Ask specifically whether AWS and any other infrastructure providers are disclosed as subprocessors, and confirm the DPA includes a 30-day advance notice commitment for subprocessor changes.
- 3
Ask Postmark's security team directly whether AI or machine learning is applied to customer email content, whether any third-party AI providers receive access to email data, and whether customer data is used in model training. Request a written response or addendum to your DPA documenting the AI data handling position.
- 4
Verify the possible HITRUST directory match manually by contacting the HITRUST Alliance directly at hitrustalliance.net or by asking Postmark's security team whether the entity listed is Postmark or its parent organization. This could represent a meaningful compliance positive if confirmed.
- 5
Flag the C- HTTP security header grade (45/100) and missing Content-Security-Policy and X-Frame-Options headers as an item for Postmark's security team to address. While this affects the marketing site rather than the sending API, it indicates room for improvement in web security hygiene. Request the vendor's roadmap for addressing these gaps within the next 6 months.
- 6
Schedule a re-assessment of this vendor in 12 months or sooner if: (a) the vendor confirms AI features are applied to email content, (b) a security incident is reported, or (c) the SOC 2 report received covers a period older than 18 months.
Intelligence Sources Queried
24 sources in this assessment
23of 24 sources returned data
IP Reputation
AI Data Usage Policy
Threat Intelligence (OTX)
Certification Registry Verification
Certificate Transparency
Domain Analysis
FDIC Institution Check
Business Registration
Historical Media Search
Tech Community Sentiment
Company Intelligence
HTTP Security Scan
Sanctions & Watchlist Screening
Malware & Phishing Check
SEC Filing Search
Infrastructure Exposure
SSL/TLS Analysis
Supply Chain & Subprocessor Discovery
Trust & Compliance Page Scan
Website Security Scan
Threat Intelligence
Web Archive History
Domain Registration
Adverse Media Scan (Fallback)
Data Coverage Notes
Some data sources may have had limited availability during this assessment. This does not reflect negatively on the vendor.
- Adverse media scan was unavailable during this investigation due to a data source outage. Historical adverse media search via Google News archive returned no results, providing partial coverage, but real-time news monitoring for the past 12 months could not be completed. Manual review of recent press coverage for Postmark and its parent company is recommended.
- External cyber risk scoring was not available for this assessment, which limits quantitative benchmarking of Postmark's overall security posture against industry peers. The infrastructure exposure and domain analysis data above provide partial substitutes.
- No publicly accessible trust or compliance page was found for Postmark, which constrained the depth of certification verification. Certifications that are only available upon request (SOC 2 Type II, ISO 27001 certificates) could not be independently assessed and must be requested directly from the vendor.
183+
Vendors assessed
98%
Average confidence
<2 min
Time to report
Security & Compliance Profile
29% complete · 39/133 questions answered from public sourcesAre you Postmark? Claim this profile to complete your security record. Buyers are reviewing this profile now.
Claim this profile →What a ThirdProof assessment covers↓
Sanctions Screening
Is Postmark on any OFAC, EU, or UN sanctions list? Are any officers or affiliates flagged?
Cyber Risk Assessment
What is Postmark's security posture? Threat intelligence scanning, known vulnerabilities, and security header analysis.
Business Registration
Is Postmark a legitimately registered business entity? Corporate status, jurisdiction, and officer verification.
Adverse Media Analysis
Has Postmark appeared in negative news coverage? Data breaches, lawsuits, regulatory actions, and complaints.
Domain & Infrastructure
Is Postmark's website secure? TLS configuration, DNS hygiene, security headers, and domain age analysis.
Company Intelligence
What are Postmark's firmographics? Employee count, industry classification, technology stack, and corporate structure.
Trust & Compliance Verification
Does Postmark claim SOC 2, ISO 27001, HITRUST, or FedRAMP? ThirdProof scans trust pages for certification claims and cross-references the FedRAMP public registry for independent verification.
Supply Chain & Subprocessor Discovery
Who does Postmark depend on? ThirdProof discovers subprocessors from vendor-published pages and runs sanctions screening and safe browsing checks against each one.
Regulatory & Financial Filings
Has Postmark appeared in SEC enforcement filings? Is it associated with any FDIC bank failures? ThirdProof searches regulatory databases with entity verification to confirm attribution.
Full methodology, rule engine, and AI disclosure: /methodology
Seeing this in an audit? ThirdProof lets you investigate Postmark and every other vendor in your stack — average report time: 7 minutes. Get Postmark's Full Report Free →
Frequently asked about Postmark
Is Postmark FedRAMP authorized?+
Postmark is not currently listed on the FedRAMP Marketplace as of March 2026.
Does Postmark have SOC 2 Type II?+
No SOC 2 found. Postmark rated Moderate Risk — 13 open ports detected. See all 6 findings →
Is Postmark on the OFAC sanctions list?+
Postmark returned no matches in ThirdProof's OFAC SDN, EU Consolidated, and UN sanctions screening as of March 2026.
What is Postmark's vendor risk tier?+
ThirdProof assigned Postmark a risk tier of Moderate Risk with 90% confidence based on assessment across 27 intelligence sources as of March 2026.
Can I get an auto-filled security questionnaire for Postmark?+
Yes. Every ThirdProof investigation of Postmark produces two deliverables: an audit-ready risk report and a 133-question security questionnaire pre-filled with evidence from 27 independent sources. The questionnaire is mapped to SIG, SOC 2, HIPAA, PCI DSS and 9 other frameworks — answered without sending Postmark a single email or waiting for a vendor response.
Is Postmark safe to use as a vendor?+
Postmark is a email delivery vendor that handles organizational data. Safety depends on their current security posture, certification status, and how they handle your specific data. ThirdProof automates this evaluation across 27 intelligence sources — sanctions databases (OFAC, EU, UN), business registration verification, adverse media scanning, and cyber risk assessment — producing a deterministic risk tier with confidence score plus an auto-filled security questionnaire. Run a free investigation to see Postmark's full risk profile.
Does Postmark have SOC 2 certification?+
No SOC 2 found. Postmark rated Moderate Risk — 13 open ports detected. See all 6 findings →
Has Postmark had any data breaches?+
Data breach history is an important signal for any vendor, particularly email delivery platforms like Postmark that handle organizational data. ThirdProof's adverse media analysis searches multiple news APIs and public records for data breaches, security incidents, lawsuits, regulatory enforcement actions, and financial distress signals. Each finding is linked to its original source with severity classification.
Is Postmark on any sanctions lists?+
Sanctions screening is standard due diligence for email delivery vendors. ThirdProof screens Postmark against OFAC SDN, consolidated international sanctions lists, and PEP databases. The screening uses entity name verification to reduce false positives. If Postmark or any associated officers appear on a sanctions list, this triggers automatic escalation to the highest risk tier.
How do I assess Postmark for vendor risk?+
Assessing Postmark as a email delivery vendor involves verifying SOC 2 Type II and applicable industry standards compliance, reviewing their subprocessor chain, and checking sanctions exposure. ThirdProof automates this across 27 intelligence sources in an average of 7 minutes — no questionnaires or vendor participation required. Your first 5 investigations are free.
How long does a ThirdProof assessment take?+
A ThirdProof assessment completes in an average of 7 minutes. 27 intelligence sources are queried in parallel — sanctions databases, business registries, threat intelligence feeds, certificate transparency logs, and more. The result is a deterministic risk tier with confidence score and audit-ready PDF report.
Is ThirdProof free?+
ThirdProof offers 5 free vendor assessments with no credit card required. Each assessment includes the full report — risk tier, confidence score, individual findings, executive summary, and PDF export. Paid plans start at $399/month for teams that need ongoing vendor monitoring.
Can I use a ThirdProof report as SOC 2 audit evidence?+
Yes. ThirdProof reports are designed to satisfy SOC 2 CC9.2 (vendor risk management) requirements. Each report includes SHA-256 integrity verification, methodology disclosure, source attribution for every finding, and AI content labeling. Auditors can independently verify the report's authenticity and trace each finding to its original source.
How is ThirdProof different from a security questionnaire?+
Security questionnaires require vendor participation, take weeks, and produce self-reported answers. ThirdProof queries 27 independent intelligence sources — no vendor involvement needed. Risk tiers are assigned by a deterministic rules engine (not AI opinion), and every finding links to its original source. You get an audit-ready report in an average of 7 minutes instead of waiting weeks for a questionnaire response.
Also investigate these vendors
Postmark is in your vendor stack. Can you prove you assessed them?
SOC 2 CC9.2, HIPAA, PCI-DSS, and CMMC all require documented vendor due diligence — not just knowing the answer, but having audit-ready evidence you verified it. Most compliance teams can't produce that documentation on demand.
ThirdProof investigates Postmark across 27 intelligence sources in an average of 7 minutes — sanctions screening, cyber posture, SOC 2 verification, FedRAMP status, and more. Every investigation produces two deliverables: an audit-ready risk report and an auto-filled security questionnaire your prospects and auditors expect to see.
✓ 5 free investigations✓ Risk report + auto-filled questionnaire✓ No credit card required✓ Average report time: 7 minutes
Replaces $600–$900 in manual compliance consulting time per vendor assessed.