Vendor Intelligence Report

Is Postmark safe for
your vendor program?

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 Low Risk tier with 94% confidence across 24 intelligence sources.

ThirdProof investigated Postmark (postmarkapp.com) across 24 intelligence sources including sanctions databases, cyber risk scores, business registries, and more.

Sanctions
Screened
Cyber Risk
Scored
Compliance
Verified
Get Postmark's Full Report Free →
No credit card required|Results in under 2 minutes
✗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.

Source: FedRAMP Marketplace

View all vendor statuses →
Real investigation recorded live — not a mockup
thirdproof.ai/investigations
Watch a live investigation — 1:571:57 — from submission to completed report
◇24 data sources queried per investigation
◷Reports generated in under 2 minutes
◈SHA-256 verified for audit integrity
✓Deterministic risk scoring — no AI guesswork
Risk Tier
Tier 4 — Low Risk
Assessment
Conditional
Confidence
94%

Investigation Preview — 23 Sources Queried

Sanctions ScreeningClear — No matches found
HTTP SecurityC- (45/100)
Domain ReputationClean across 94 security engines
Infrastructure13 open ports, 0 CVEs
Malware & PhishingClean
IP ReputationAbuse score: 0%, 0 reports
Domain Age16.8 years
Certifications (Vendor-Attested)
SOC 1GDPRCCPA

Full investigation report with evidence chain, compliance assessment, and recommended actions.

Investigate Postmark — First Investigation Free →

Executive Summary Preview

Postmark (postmarkapp.com) is a transactional email delivery SaaS provider with a 16-year established domain history and a clean security reputation across all threat intelligence sources. The rule engine has assigned a Tier 4 (Low Risk) rating with a 94% confidence score, reflecting a strong overall posture with a small number of low-severity findings.

This is an excerpt from the full ThirdProof investigation report. Get the complete report →

Key Findings for Postmark

SeverityFindingSource
infoClean domain reputationThreat Intelligence
low13 open ports detectedInfrastructure Exposure
lowNo subprocessor page foundSupply Chain & Subprocessor Discovery
low3 certifications claimed but not independently verifiedTrust & Compliance Page Scan

4 total findings in the full report. View all findings →

Recommended Actions

  1. Request Postmark's SOC 1 Type II report and any available SOC 2 Type II report — email their security team via https://postmarkapp.com/contact or check their trust page at https://postmarkapp.com/security. Many vendors provide these under NDA. If a SOC 2 Type II report exists, prioritize reviewing the availability, change management, and logical access control sections.
  2. Request a signed GDPR Data Processing Agreement (DPA) and subprocessor list from Postmark before transmitting any EU consumer data — initiate this request via their privacy contact at https://postmarkapp.com/privacy. This is a legal requirement under GDPR Article 28 and should be completed within 30 days.
  3. For PCI-DSS 4.0 Requirement 12.8 compliance, add Postmark to your TPSP register and document: (a) what PCI controls Postmark manages vs. your organization, (b) whether email content or delivery logs could contain or reference cardholder data, and (c) request Postmark's PCI-DSS AOC if they handle or transmit any payment-adjacent data.

Full recommendations available in the complete report.

Get the Full Report — First Investigation Free →

“We manage nearly 100 vendors touching customer payment data. ThirdProof gives me audit-ready evidence in the time it used to take just to send the questionnaire.”

— April, Co-owner, The Perky Lady

What you'll see in Postmark's report

Every ThirdProof report includes these sections

Risk Tier1–5 scale

Deterministic score based on evidence — not AI opinion

Confidence Score0–100%

Understand how complete the picture is — higher confidence means more data sources returned results

Individual FindingsPer-source

Each finding linked to its source with severity rating

Executive SummaryAI synthesis

Know exactly what to do next — plain-language guidance for your compliance team

Compliance Status3-tier verification

Independently verified, vendor attested, or not found

PDF ExportSHA-256 sealed

Audit-ready report with methodology disclosure

ThirdProof uses a deterministic rules engine to assign risk tiers. AI writes the narrative — rules drive the decision.

Intelligence Sources Queried for Postmark

✓Sanctions & Watchlists
✓Business Registration
✓Adverse Media Scan
✓Company Intelligence
✓Domain Analysis
✓Infrastructure Exposure
✓Domain Registration
✓Threat Intelligence
✓Tech Community Sentiment
✓HTTP Security Scan
✓SSL/TLS Analysis
✓Certificate Transparency
✓Web Archive History
✓Threat Intel (OTX)
✓IP Reputation
✓Malware & Phishing Check
✓Website Security Scan
✓Trust & Compliance Scan
✓Subprocessor Discovery
✓FDIC Registry Check
✓SEC Filing Search
✓Historical Media Search
✓Certification Registry

Get Postmark's complete risk report — risk tier, confidence score, individual findings, and AI synthesis — in under 2 minutes.

Get Postmark's Risk Report Free →

No credit card required

What a ThirdProof investigation 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.

Compliance Resources

→ SOC 2 Vendor Assessment: What Your Auditor Actually Reviews→ SOC 2 CC9.2 Vendor Management with ThirdProof→ Sanctions Screening for Vendor Due Diligence→ Vendor Due Diligence Checklist→ All 24 Intelligence Sources

Frequently asked about Postmark

Is Postmark safe to use as a vendor?+
Postmark can be evaluated for vendor safety by checking sanctions databases (OFAC, EU, UN), verifying business registration through legal entity registries like GLEIF, scanning for adverse media coverage including data breaches and regulatory actions, and assessing domain security and cyber risk posture. ThirdProof automates this entire investigation across 24 intelligence sources and produces a deterministic risk tier (1-5 scale) with a confidence score. Run a free investigation to see Postmark's full risk profile.
Does Postmark have SOC 2 certification?+
To verify whether Postmark holds SOC 2 certification, ThirdProof scans the vendor's trust page and security documentation for certification claims, then cross-references those claims against independent registries where available (such as the FedRAMP Marketplace for FedRAMP authorization). Certifications are classified as independently verified, vendor attested, or not found in evidence — ensuring you know the verification level of each claim.
Is Postmark FedRAMP authorized?+
Based on ThirdProof's investigation, Postmark is not currently listed on the FedRAMP Marketplace. Organizations with federal compliance requirements should verify this directly and consider alternative vendors with FedRAMP authorization where required.
Has Postmark had any data breaches?+
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 involving Postmark. Each finding is linked to its original source with severity classification. The investigation also checks SEC EDGAR for enforcement-related filings and FDIC records for financial institution failures, providing a comprehensive public record review.
Is Postmark on any sanctions lists?+
ThirdProof screens Postmark against OFAC SDN, consolidated international sanctions lists, and PEP (Politically Exposed Persons) databases. The screening uses entity name verification to reduce false positives from similar names. If Postmark or any associated officers appear on a sanctions list, this triggers an automatic escalation to the highest risk tier. No sanctions match is confirmed through a clean screening report in the investigation output.
How do I assess Postmark for vendor risk?+
ThirdProof investigates Postmark autonomously in under 2 minutes using 24 intelligence sources — no questionnaires, no vendor participation required. The investigation covers sanctions screening, cyber risk scoring, business registration, adverse media, domain security, and more. Reports are formatted for SOC 2, HIPAA, PCI-DSS, and CMMC compliance frameworks. Your first investigation is free.

Also investigated by ThirdProof

SendGrid
email delivery
Stripe
payments
Square
payments
Braintree
payments
View all vendorsPricingLearn

Get the full report on Postmark

Your first vendor investigation is completely free. Results in under 2 minutes.

Get Postmark's Risk Report Free →

No credit card required

After your free investigation, plans start at $399/mo for up to 25 investigations.

Want a walkthrough of ThirdProof for your team?

▶Request a Personalized Demo