| 2025-11-17T00:22:18.17 | 2025-10-02T00:00:00 | 2026-10-06T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2025-10-02T06:52:07.966 | 2025-10-02T00:00:00 | 2026-10-06T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2025-07-18T15:30:14.628 | 2025-07-18T00:00:00 | 2026-01-23T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2025-02-21T01:40:25.599 | 2024-09-20T00:00:00 | 2025-10-03T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2025-01-13T09:12:16.842 | 2025-01-13T00:00:00 | 2025-07-21T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2024-10-14T08:20:31.622 | 2024-10-14T00:00:00 | 2025-01-11T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2024-09-20T19:29:30.902 | 2024-09-20T00:00:00 | 2025-10-03T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2024-08-29T08:24:53.868 | 2024-08-29T00:00:00 | 2024-10-12T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2024-07-15T08:19:08.883 | 2024-07-15T00:00:00 | 2024-08-28T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2024-05-08T17:47:14.187 | 2024-05-08T00:00:00 | 2024-10-03T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2024-04-12T15:56:06.785 | 2024-04-12T00:00:00 | 2024-07-10T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2023-09-27T18:44:26.469 | 2023-09-27T00:00:00 | 2024-04-11T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2023-09-27T18:32:49.341 | 2023-09-27T00:00:00 | 2024-10-03T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 |
| 2023-07-06T18:25:17.345 | 2023-07-06T00:00:00 | 2023-10-03T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2023-05-09T14:54:09.772 | 2023-05-09T00:00:00 | 2023-07-07T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2023-03-10T10:44:36.803 | 2023-03-10T00:00:00 | 2023-05-08T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2023-01-24T09:43:28.948 | 2023-01-24T00:00:00 | 2023-03-09T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2022-12-20T17:23:57.352 | 2022-12-20T00:00:00 | 2023-02-02T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2022-11-09T18:04:29.507 | 2022-11-09T00:00:00 | 2022-12-23T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2022-09-07T17:24:45.596 | 2022-09-07T00:00:00 | 2023-10-04T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2021-11-25T14:53:04.221 | 2021-11-25T00:00:00 | 2022-09-30T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2021-11-18T18:23:25.138 | 2021-11-18T00:00:00 | 2022-11-24T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2021-08-20T13:54:06.366 | 2021-08-20T00:00:00 | 2022-09-20T23:59:59 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2020-11-10T19:28:25.631 | 2020-11-10T00:00:00 | 2021-11-22T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2020-08-04T09:37:05.647 | 2020-08-04T00:00:00 | 2021-09-29T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2019-12-03T06:56:46.353 | 2019-11-13T00:00:00 | 2020-11-14T12:00:00 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2019-11-13T08:22:40.393 | 2019-11-13T00:00:00 | 2020-11-14T12:00:00 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust RSA CA 2018 |
| 2019-10-04T00:17:16.936 | 2019-09-09T00:00:00 | 2020-08-27T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2019-09-09T16:21:53.874 | 2019-09-09T00:00:00 | 2020-08-27T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2019-09-09T02:48:02.865 | 2019-08-27T00:00:00 | 2020-08-27T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2019-08-27T14:52:33.857 | 2019-08-27T00:00:00 | 2020-08-27T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2018-12-19T18:58:22.524 | 2018-11-15T00:00:00 | 2019-11-15T12:00:00 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2018-11-15T09:22:11.903 | 2018-11-15T00:00:00 | 2019-11-15T12:00:00 | *.posteo.de | *.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1 |
| 2018-10-01T17:19:41.992 | 2018-08-28T00:00:00 | 2019-08-28T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2018-08-28T14:34:57.11 | 2018-08-28T00:00:00 | 2019-08-28T12:00:00 | mx01.posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2018-01-18T13:19:27.688 | 2017-12-29T00:00:00 | 2019-01-22T12:00:00 | posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2018-01-08T13:04:33.105 | 2018-01-08T13:04:32 | 2019-01-08T14:01:58 | posteo.de | mx01.posteo.de | C=DE, O=D-Trust GmbH, CN=D-TRUST SSL Class 3 CA 1 EV 2009 |
| 2017-12-29T14:26:05.235 | 2017-12-29T00:00:00 | 2019-01-22T12:00:00 | posteo.de | mx01.posteo.de | C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust EV RSA CA 2018 |
| 2017-08-30T05:33:54.103 | 2017-08-30T05:33:53 | 2017-12-16T07:31:34 | posteo.de | mx01.posteo.de | C=DE, O=D-Trust GmbH, CN=D-TRUST SSL Class 3 CA 1 EV 2009 |
| 2017-05-06T22:03:30.246 | 2017-01-26T00:00:00 | 2019-01-26T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust SHA256 SSL CA |
| 2017-01-26T10:25:03.147 | 2017-01-26T00:00:00 | 2019-01-26T23:59:59 | *.posteo.de | *.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust SHA256 SSL CA |
| 2017-01-21T14:48:56.098 | 2016-12-30T00:00:00 | 2018-01-21T23:59:59 | posteo.de | mx01.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust EV SSL CA - G4 |
| 2016-12-30T14:10:02.976 | 2016-12-30T00:00:00 | 2018-01-21T23:59:59 | posteo.de | mx01.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust EV SSL CA - G4 |
| 2016-09-18T04:58:31.819 | 2010-10-08T06:51:54 | 2012-10-08T16:51:17 | *.posteo.de | *.posteo.de | C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA |
| 2016-04-16T20:27:39.479 | 2016-04-16T20:07:35 | 2018-04-16T20:07:35 | posteo.de | mx01.posteo.de | C=IL, O=StartCom Ltd., OU=StartCom Certification Authority, CN=StartCom Class 4 EV Server CA |
| 2016-03-08T12:06:10.909 | 2014-04-10T16:47:45 | 2015-04-10T16:47:45 | *.posteo.de | *.posteo.de | C=CH, O=SwissSign AG, CN=SwissSign Server Silver CA 2008 - G2 |
| 2016-02-07T22:07:46.844 | 2016-01-22T00:00:00 | 2017-01-21T23:59:59 | posteo.de | mx01.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust EV SSL CA - G4 |
| 2016-01-22T15:25:05.142 | 2016-01-22T00:00:00 | 2017-01-21T23:59:59 | posteo.de | mx01.posteo.de | C=US, O=GeoTrust Inc., CN=GeoTrust EV SSL CA - G4 |
| 2016-01-03T11:56:45.842 | 2016-01-03T11:35:28 | 2016-05-03T11:35:28 | www.posteo.de | mx01.posteo.de | C=IL, O=StartCom Ltd., OU=StartCom Certification Authority, CN=StartCom Extended Validation Server CA |
| 2015-12-22T11:47:13.846 | 2015-10-20T12:22:43 | 2016-10-20T14:20:11 | posteo.de | mx01.posteo.de | C=DE, O=D-Trust GmbH, CN=D-TRUST SSL Class 3 CA 1 EV 2009 |
| 2014-04-19T15:24:59.17 | 2014-04-16T07:26:50 | 2017-04-16T04:17:22 | *.posteo.de | *.posteo.de | C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 3 Primary Intermediate Server CA |
| 2014-04-19T12:54:29.951 | 2014-04-16T13:03:06 | 2016-04-16T16:23:04 | www.posteo.de | mx01.posteo.de | C=IL, O=StartCom Ltd., OU=StartCom Certification Authority, CN=StartCom Extended Validation Server CA |
| 2013-05-13T11:50:04.129 | 2012-09-26T09:30:17 | 2014-09-28T01:59:47 | *.posteo.de | *.posteo.de | C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA |
| 2013-04-22T11:28:01.855 | 2013-01-03T18:08:56 | 2016-01-04T23:53:52 | *.posteo.de | *.posteo.de | C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 3 Primary Intermediate Server CA |