postmarkapp.com Domain Information

DNS records

1.1.1.1 Resolver query results

Subject	Validity Period	Issuer	CT Log
postmarkapp.com	1 yearNot Before: Dec 30, 2025, 00:00:00 Not After: Jan 28, 2027, 23:59:59	Amazon RSA 2048 M04Amazon	Nimbus2027
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Dec 30, 2025, 00:00:00 Not After Jan 28, 2027, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M04 Organization (O) Amazon Country / Territory (C) United States CT Log Nimbus2027
postmarkapp.com	7 monthsNot Before: Apr 12, 2026, 00:00:00 Not After: Oct 26, 2026, 23:59:59	Amazon RSA 2048 M04Amazon	Willow2026h2
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Apr 12, 2026, 00:00:00 Not After Oct 26, 2026, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M04 Organization (O) Amazon Country / Territory (C) United States CT Log Willow2026h2
*.postmarkapp.comActiveCampaign, LLC	1 yearNot Before: Sep 24, 2025, 00:00:00 Not After: Oct 25, 2026, 23:59:59	DigiCert Global G2 TLS RSA SHA256 2020 CA1DigiCert Inc	Argon2026h2
Subject Common Name (CN) *.postmarkapp.com Organization (O) ActiveCampaign, LLC Country / Territory (C) United States Validity Period Not Before Sep 24, 2025, 00:00:00 Not After Oct 25, 2026, 23:59:59 Issuer Common Name (CN) DigiCert Global G2 TLS RSA SHA256 2020 CA1 Organization (O) DigiCert Inc Country / Territory (C) United States CT Log Argon2026h2
postmarkapp.com	1 yearNot Before: Sep 18, 2025, 00:00:00 Not After: Oct 17, 2026, 23:59:59	Amazon RSA 2048 M04Amazon	Nimbus2026
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Sep 18, 2025, 00:00:00 Not After Oct 17, 2026, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M04 Organization (O) Amazon Country / Territory (C) United States CT Log Nimbus2026
postmarkapp.com	1 yearNot Before: Sep 6, 2025, 00:00:00 Not After: Oct 5, 2026, 23:59:59	Amazon RSA 2048 M04Amazon	Nimbus2026
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Sep 6, 2025, 00:00:00 Not After Oct 5, 2026, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M04 Organization (O) Amazon Country / Territory (C) United States CT Log Nimbus2026
postmarkapp.com	1 yearNot Before: May 12, 2025, 00:00:00 Not After: Jun 10, 2026, 23:59:59	Amazon RSA 2048 M03Amazon	Wyvern2026h1
Subject Common Name (CN) postmarkapp.com Validity Period Not Before May 12, 2025, 00:00:00 Not After Jun 10, 2026, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M03 Organization (O) Amazon Country / Territory (C) United States CT Log Wyvern2026h1
postmarkapp.com	3 monthsNot Before: Feb 27, 2026, 08:44:32 Not After: May 28, 2026, 09:44:30	WE1Google Trust Services	Halloumi2026h1
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Feb 27, 2026, 08:44:32 Not After May 28, 2026, 09:44:30 Issuer Common Name (CN) WE1 Organization (O) Google Trust Services Country / Territory (C) United States CT Log Halloumi2026h1
postmarkapp.com	3 monthsNot Before: Feb 9, 2026, 10:06:58 Not After: May 10, 2026, 11:06:56	WE1Google Trust Services	Halloumi2026h1
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Feb 9, 2026, 10:06:58 Not After May 10, 2026, 11:06:56 Issuer Common Name (CN) WE1 Organization (O) Google Trust Services Country / Territory (C) United States CT Log Halloumi2026h1
postmarkapp.com	3 monthsNot Before: Dec 16, 2025, 21:35:39 Not After: Mar 12, 2026, 09:55:22	WR1Google Trust Services	Sphinx2026h1
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Dec 16, 2025, 21:35:39 Not After Mar 12, 2026, 09:55:22 Issuer Common Name (CN) WR1 Organization (O) Google Trust Services Country / Territory (C) United States CT Log Sphinx2026h1
postmarkapp.com	1 yearNot Before: Oct 17, 2024, 00:00:00 Not After: Nov 16, 2025, 23:59:59	Amazon RSA 2048 M03Amazon	Sabre2025h2
Subject Common Name (CN) postmarkapp.com Validity Period Not Before Oct 17, 2024, 00:00:00 Not After Nov 16, 2025, 23:59:59 Issuer Common Name (CN) Amazon RSA 2048 M03 Organization (O) Amazon Country / Territory (C) United States CT Log Sabre2025h2

Subject

Validity Period

Issuer

CT Log

postmarkapp.com

1 yearNot Before: Dec 30, 2025, 00:00:00
Not After: Jan 28, 2027, 23:59:59

Amazon RSA 2048 M04Amazon

Nimbus2027

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Dec 30, 2025, 00:00:00
Not After: Jan 28, 2027, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M04
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Nimbus2027

postmarkapp.com

7 monthsNot Before: Apr 12, 2026, 00:00:00
Not After: Oct 26, 2026, 23:59:59

Amazon RSA 2048 M04Amazon

Willow2026h2

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Apr 12, 2026, 00:00:00
Not After: Oct 26, 2026, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M04
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Willow2026h2

*.postmarkapp.comActiveCampaign, LLC

1 yearNot Before: Sep 24, 2025, 00:00:00
Not After: Oct 25, 2026, 23:59:59

DigiCert Global G2 TLS RSA SHA256 2020 CA1DigiCert Inc

Argon2026h2

Subject

Common Name (CN): *.postmarkapp.com
Organization (O): ActiveCampaign, LLC
Country / Territory (C): United States

Validity Period

Not Before: Sep 24, 2025, 00:00:00
Not After: Oct 25, 2026, 23:59:59

Issuer

Common Name (CN): DigiCert Global G2 TLS RSA SHA256 2020 CA1
Organization (O): DigiCert Inc
Country / Territory (C): United States

CT Log

Argon2026h2

postmarkapp.com

1 yearNot Before: Sep 18, 2025, 00:00:00
Not After: Oct 17, 2026, 23:59:59

Amazon RSA 2048 M04Amazon

Nimbus2026

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Sep 18, 2025, 00:00:00
Not After: Oct 17, 2026, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M04
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Nimbus2026

postmarkapp.com

1 yearNot Before: Sep 6, 2025, 00:00:00
Not After: Oct 5, 2026, 23:59:59

Amazon RSA 2048 M04Amazon

Nimbus2026

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Sep 6, 2025, 00:00:00
Not After: Oct 5, 2026, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M04
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Nimbus2026

postmarkapp.com

1 yearNot Before: May 12, 2025, 00:00:00
Not After: Jun 10, 2026, 23:59:59

Amazon RSA 2048 M03Amazon

Wyvern2026h1

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: May 12, 2025, 00:00:00
Not After: Jun 10, 2026, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M03
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Wyvern2026h1

postmarkapp.com

3 monthsNot Before: Feb 27, 2026, 08:44:32
Not After: May 28, 2026, 09:44:30

WE1Google Trust Services

Halloumi2026h1

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Feb 27, 2026, 08:44:32
Not After: May 28, 2026, 09:44:30

Issuer

Common Name (CN): WE1
Organization (O): Google Trust Services
Country / Territory (C): United States

CT Log

Halloumi2026h1

postmarkapp.com

3 monthsNot Before: Feb 9, 2026, 10:06:58
Not After: May 10, 2026, 11:06:56

WE1Google Trust Services

Halloumi2026h1

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Feb 9, 2026, 10:06:58
Not After: May 10, 2026, 11:06:56

Issuer

Common Name (CN): WE1
Organization (O): Google Trust Services
Country / Territory (C): United States

CT Log

Halloumi2026h1

postmarkapp.com

3 monthsNot Before: Dec 16, 2025, 21:35:39
Not After: Mar 12, 2026, 09:55:22

WR1Google Trust Services

Sphinx2026h1

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Dec 16, 2025, 21:35:39
Not After: Mar 12, 2026, 09:55:22

Issuer

Common Name (CN): WR1
Organization (O): Google Trust Services
Country / Territory (C): United States

CT Log

Sphinx2026h1

postmarkapp.com

1 yearNot Before: Oct 17, 2024, 00:00:00
Not After: Nov 16, 2025, 23:59:59

Amazon RSA 2048 M03Amazon

Sabre2025h2

Subject

Common Name (CN): postmarkapp.com

Validity Period

Not Before: Oct 17, 2024, 00:00:00
Not After: Nov 16, 2025, 23:59:59

Issuer

Common Name (CN): Amazon RSA 2048 M03
Organization (O): Amazon
Country / Territory (C): United States

CT Log

Sabre2025h2

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