Postmark

postmarkapp.com · email · Part of ActiveCampaign

Postmark declares 2 subprocessors in its subprocessor list, which we last checked on Nov 11, 2026 (evidence). They include Amazon Web Services. No published changes since we first read it on Sep 22, 2026. 149 tracked vendors name Postmark as a subprocessor, including Twilio, SendGrid and Segment.

Documents marked from ActiveCampaign are ActiveCampaign's.

Subprocessors CSV · Atom DORA draft CSV what's this? · 

2 third parties.

NamePurposeLocationListed since
Amazon Web Services Cloud infrastructure hosting
Deft (formerly known as ServerCentral) Infrastructure hosting

Web TechnologiesCSV · Atom

Postmark's homepage made 64 requests to 12 domains, and 6 services controlled by another company.

Advertising (2): OpenAI, X Corp.Analytics (2): Google Cloud; usually detected as Analytics: SmartBear SoftwareCookie compliance (1): CookieYesUnclassified (1): no technology detected from them: Servd

6 third parties by category: Advertising 2Analytics 2Cookie compliance 1Unclassified 1

Third parties 6 · 36 requests
Google Cloud Google Analytics Google Tag Manager 16% of the page's requests 10
CookieYes CookieYes 14% of the page's requests 9
Servd svdcdn.com 14% of the page's requests 9
OpenAI ChatGPT Ads Measurement Pixel 5% of the page's requests 3
X Corp. Twitter Ads 5% of the page's requests 3
SmartBear Software bugsnag.com 3% of the page's requests 2
First party 1 · 28 requests
Postmark Cloudflare HSTS HTTP/3 Open Graph Priority Hints Prism Snowplow Analytics scrollreveal 44% of the page's requests 28

4 tracked companies loaded by the homepage are not in Postmark's subprocessor list. A website can use a service without it processing customer data.

Subprocessor of (149)CSV · Atom

1–50 of 149
  • 1Password 1password.com Customer support
  • Abusix abusix.com Delivery of transactional and notification emails.; Transactional email
  • Aleph getaleph.com Email delivery
  • Alguna alguna.com Transactional email
  • Alke Tech alketech.eu
  • Altvia altvia.com Email message delivery and mailing statistics
  • Arrows arrows.to Application email service; Sends transactional and notification emails from the application
  • AspirePro aspirepro.io Inbound email processing for email-to-ticket
  • Attio attio.com Email Delivery
  • Balsamiq balsamiq.com Transactional email delivery
  • Binti binti.com Email delivery; Email delivery service provider.
  • Bird bird.com Dashboard - Log management and Analysis software
  • Blinq blinq.me
  • Blissbook blissbook.com Transactional email
  • BoldDesk bolddesk.com Email Service Provider; Email to ticket inbound processor
  • BoldSign boldsign.com Email service provider; Sending transactional emails on behalf of the SaaS provider
  • BrightLocal brightlocal.com Email sending services
  • BrowserStack browserstack.com Email notifications for enterprise customers
  • Buttondown buttondown.com Email delivery and transactional email services
  • Camino joincamino.com Transactional email delivery — sends system notifications, onboarding emails, and task reminders
  • Capacity capacity.com Sends time-sensitive transactional emails and scheduling notifications for Capacity Scheduling, ensuring reliable delivery of workflow alerts.; Transactional email delivery
  • Ceros ceros.com Engineering; Relevant Customer Data: The name and email provided by a customer during Pilot acceptance.
  • Chameleon Intelligent Tech chameleon.io Communications and Personalization
  • Chatra chatra.com Email infrastructure
  • Civic Roundtable civicroundtable.com Notifications; Sends emails.
  • Clay clay.com Email service provider
  • ClientSuccess clientsuccess.com Email Service Provider
  • Cloutly cloutly.com Transactional and campaign email delivery
  • Clozd clozd.com Email delivery services. [ActiveCampaign Data Protection and Security Center](; Required
  • CoachAccountable coachaccountable.com Email sending
  • CodeSignal codesignal.com Email Delivery; Email Delivery Service
  • Concord concord.app Transactional text message sender
  • Contentsquare contentsquare.com Email delivery service
  • Conveyor conveyor.com Email
  • CookieChimp cookiechimp.com Transactional email
  • Credly by Pearson info.credly.com Email services for the Motiva product; Used to send invitation emails to Learners
  • CustomerOS customeros.ai Cloud email service
  • DataForSEO dataforseo.com
  • DitchCarbon ditchcarbon.com Transactional email
  • Dock dock.us Email delivery
  • Dotfile dotfile.com Engineering; Transactional email delivery
  • Drata drata.com [Drata and SafeBase] Postmark provides transactional email delivery services used to send system-generated emails from the platform and helps ensure reliable and secure email delivery to users.
  • EasyLlama easyllama.com Transactional messaging
  • Edmentum edmentum.com Email delivery
  • Enchant enchant.com Email Processing
  • Eptura eptura.com Transactional Email Management
  • Ethos askethos.com Transactional email delivery services
  • Everapi everapi.com
  • EverTrue evertrue.com Email service provider
  • Fathom fathom.ai Email Provider
  • Show next 50

Service statusCSV · Atom

Aug 15: no incident reportedAug 16: no incident reportedAug 17: no incident reportedAug 18: 1 incident (1 no impact stated)Aug 19: no incident reportedAug 20: no incident reportedAug 21: no incident reportedAug 22: no incident reportedAug 23: no incident reportedAug 24: 1 incident (1 no impact stated)Aug 25: no incident reportedAug 26: no incident reportedAug 27: no incident reportedAug 28: no incident reportedAug 29: no incident reportedAug 30: no incident reportedAug 31: no incident reportedSep 1: no incident reportedSep 2: no incident reportedSep 3: no incident reportedSep 4: no incident reportedSep 5: no incident reportedSep 6: no incident reportedSep 7: no incident reportedSep 8: no incident reportedSep 9: no incident reportedSep 10: no incident reportedSep 11: no incident reportedSep 12: no incident reportedSep 13: no incident reportedSep 14: no incident reportedSep 15: no incident reportedSep 16: no incident reportedSep 17: 1 incident (1 no impact stated)Sep 18: no incident reportedSep 19: no incident reportedSep 20: no incident reportedSep 21: no incident reportedSep 22: 1 incident (1 no impact stated)Sep 23: no incident reportedSep 24: no incident reportedSep 25: no incident reportedSep 26: no incident reportedSep 27: no incident reportedSep 28: 2 incidents (2 no impact stated)Sep 29: no incident reportedSep 30: no incident reportedOct 1: no incident reportedOct 2: no incident reportedOct 3: no incident reportedOct 4: no incident reportedOct 5: no incident reportedOct 6: no incident reportedOct 7: no incident reportedOct 8: no incident reportedOct 9: no incident reportedOct 10: no incident reportedOct 11: no incident reportedOct 12: no incident reportedOct 13: no incident reportedOct 14: no incident reportedOct 15: no incident reportedOct 16: no incident reportedOct 17: no incident reportedOct 18: no incident reportedOct 19: no incident reportedOct 20: no incident reportedOct 21: no incident reportedOct 22: no incident reportedOct 23: no incident reportedOct 24: no incident reportedOct 25: no incident reportedOct 26: no incident reportedOct 27: 1 incident (1 no impact stated)Oct 28: no incident reportedOct 29: no incident reportedOct 30: no incident reportedOct 31: no incident reportedNov 1: no incident reportedNov 2: no incident reportedNov 3: no incident reportedNov 4: 1 incident (1 no impact stated)Nov 5: 1 incident (1 no impact stated)Nov 6: no incident reportedNov 7: no incident reportedNov 8: no incident reportedNov 9: no incident reportedNov 10: no incident reportedNov 11: no incident reportedNov 12: no incident reported

90 days agotoday

  • 10 incidents in 90 days
  • 0 major or critical
  • 3 h 32 min typical time to resolve
BeganIncidentImpactLasted
Delays in activity datano impact stated5 h 53 min
Delays processing Inbound messagesno impact stated3 h 32 min
SMS codes for two-factor authentication may not arriveno impact stated1 h 43 min
Delayed Inbound Message Processingno impact stated2 h 5 min
Delayed Message Deliveryno impact stated3 h 58 min
Delayed Message Deliveryno impact stated20 min
Web-App Page Loading Issuesno impact stated1 h 33 min
Delays in Stats Datano impact stated3 h 20 min

Incidents per month

0 3 6 Mar 2026: 5 incidents (5 no impact stated) · partial: our history begins Mar 4 · typical time to resolve 2 h 9 min Apr 2026: 3 incidents (3 no impact stated) · typical time to resolve 6 h 3 min May 2026: 2 incidents (2 no impact stated) · typical time to resolve 27 h 20 min Jun 2026: 3 incidents (3 no impact stated) · typical time to resolve 27 h 7 min Jul 2026: 1 incident (1 no impact stated) · typical time to resolve 6 h 15 min Aug 2026: 3 incidents (3 no impact stated) · typical time to resolve 16 h 50 min Sep 2026: 4 incidents (4 no impact stated) · typical time to resolve 2 h 5 min Oct 2026: 1 incident (1 no impact stated) · typical time to resolve 1 h 43 min Nov 2026: 2 incidents (2 no impact stated) · typical time to resolve 5 h 53 min Mar 2026Apr May Jun Jul Aug Sep Oct Nov

critical major minor no impact stated before or partly before our history

As Postmark's status page reports its own incidents (scheduled maintenance left out), read every few hours since (evidence)

ChangesCSV · Atom

See the list as we read it on any date: Time machine

None since tracking began.

Rating badge for Postmark's site

Postmark transparency rating

It updates with the rating.

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