SSL-Tools

SSL check results of postbox.ch

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Discover if the mail servers for postbox.ch can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Mon, 04 Jan 2021 01:48:18 +0000

The mailservers of postbox.ch can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

These servers are responsible for incoming mails to @postbox.ch addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.postbox.ch
193.138.212.17
 10
supported
mail.postbox.ch
DANE
missing
PFS
unsupported
Heartbleed
not vulnerable
Weak ciphers
supported
  • SSL_RSA_WITH_RC4_128_SHA
  • SSL_RSA_EXPORT_WITH_RC4_40_MD5
  • TLSv1.0
  • SSLv3
3 s

Outgoing Mails

We have not received any emails from a @postbox.ch address so far. Test mail delivery

Certificates

First seen at:

CN=mail.postbox.ch

Certificate chain
  • mail.postbox.ch
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Unknown Authority
      GeoTrust RSA CA 2018
Subject
Common Name (CN)
  • mail.postbox.ch
Alternative Names
  • mail.postbox.ch
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Organizational Unit (OU)
  • www.digicert.com
Common Name (CN)
  • GeoTrust RSA CA 2018
validity period
Not valid before
2020-03-29
Not valid after
2022-04-28
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C9:1D:11:4F:0E:4D:B4:E3:28:AD:F5:66:AB:69:8B:6E:BB:72:17:FD:7C:33:05:E9:1C:E1:24:A6:60:57:47:91
SHA1
47:DF:77:15:08:B4:C9:CA:21:59:20:B4:E9:72:EC:8D:27:D7:BA:4F
X509v3 extensions
authorityKeyIdentifier
  • keyid:90:58:FF:B0:9C:75:A8:51:54:77:B1:ED:F2:A3:43:16:38:9E:6C:C5
subjectKeyIdentifier
  • 1D:09:16:40:84:28:AA:F4:1D:E1:A0:09:15:CC:9D:8B:A1:5C:63:1A
crlDistributionPoints
  • Full Name:
  • URI:http://cdp.geotrust.com/GeoTrustRSACA2018.crl
certificatePolicies
  • Policy: 2.16.840.1.114412.1.2
  • CPS: https://www.digicert.com/CPS
  • Policy: 2.23.140.1.2.1
authorityInfoAccess
  • OCSP - URI:http://status.geotrust.com
  • CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustRSACA2018.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : BB:D9:DF:BC:1F:8A:71:B5:93:94:23:97:AA:92:7B:47:
  • 38:57:95:0A:AB:52:E8:1A:90:96:64:36:8E:1E:D1:85
  • Timestamp : Mar 29 01:24:25.615 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:E6:0C:56:F0:23:99:9C:66:0C:58:44:
  • FA:2B:99:E4:2F:60:E9:FF:0D:B1:BA:61:F7:16:5F:98:
  • A1:D2:88:7E:A1:02:20:02:29:E0:AB:51:20:22:AE:22:
  • 95:07:49:0D:B7:7B:F7:F5:06:51:EF:6C:FD:00:22:6A:
  • 51:54:CA:41:9E:BA:18
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 22:45:45:07:59:55:24:56:96:3F:A1:2F:F1:F7:6D:86:
  • E0:23:26:63:AD:C0:4B:7F:5D:C6:83:5C:6E:E2:0F:02
  • Timestamp : Mar 29 01:24:25.667 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:99:32:7F:49:DD:65:36:59:12:32:85:
  • 3F:63:AA:BB:6F:33:98:5B:E0:3C:43:E5:22:43:A1:19:
  • 6A:3D:F7:BB:F5:02:21:00:96:8F:27:46:87:7F:00:61:
  • D9:4D:D3:6C:D7:64:7C:45:0B:DB:DF:00:17:9A:EB:66:
  • 65:63:A2:68:F1:BC:54:93
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 51:A3:B0:F5:FD:01:79:9C:56:6D:B8:37:78:8F:0C:A4:
  • 7A:CC:1B:27:CB:F7:9E:88:42:9A:0D:FE:D4:8B:05:E5
  • Timestamp : Mar 29 01:24:25.698 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:86:03:C9:85:47:FF:7B:75:B4:DF:40:
  • 74:6E:15:BE:C6:AC:CB:2D:95:8F:E8:72:CA:3E:BC:D1:
  • 5C:29:17:D6:CB:02:21:00:E6:C9:93:2D:8B:CC:08:70:
  • 1C:9A:33:84:B3:09:9F:81:45:0C:A1:60:3C:B8:0F:D7:
  • E3:E1:E9:61:BF:D3:FA:9F