SSL-Tools

SSL check results of flexpers.de

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Discover if the mail servers for flexpers.de 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

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Report created Thu, 17 Jul 2025 23:56:22 +0000

The mailservers of flexpers.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @flexpers.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
flexpers.de
2001:7f0:3000:549::554:194
 10
supported
flexpers.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
flexpers.de
83.133.246.194
 10
supported
flexpers.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=flexpers.de

Certificate chain
  • flexpers.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R10
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • flexpers.de
Alternative Names
  • flexpers.de
  • webmail.flexpers.de
  • www.flexpers.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R10
validity period
Not valid before
2025-06-15
Not valid after
2025-09-13
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
13:99:FA:13:7D:0C:F3:5D:45:B9:70:F3:B7:FB:30:01:56:3C:18:97:83:E9:F1:1A:14:68:82:49:D0:07:22:6E
SHA1
2E:4F:BD:49:82:A8:01:CB:FF:B5:72:E2:34:99:8C:CB:D8:D3:9E:97
X509v3 extensions
subjectKeyIdentifier
  • 63:27:75:B1:51:6D:83:1E:7E:38:D3:2A:8E:A4:30:84:95:98:71:BF
authorityKeyIdentifier
  • keyid:BB:BC:C3:47:A5:E4:BC:A9:C6:C3:A4:72:0C:10:8D:A2:35:E1:C8:E8
authorityInfoAccess
  • CA Issuers - URI:http://r10.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r10.c.lencr.org/32.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : DD:DC:CA:34:95:D7:E1:16:05:E7:95:32:FA:C7:9F:F8:
  • 3D:1C:50:DF:DB:00:3A:14:12:76:0A:2C:AC:BB:C8:2A
  • Timestamp : Jun 15 11:06:25.976 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:A6:E9:86:97:95:17:B4:1B:D8:EA:6B:
  • F0:D5:DA:1E:10:92:C1:0E:6A:D6:4F:62:DB:51:BC:5F:
  • C5:AA:C4:44:65:02:20:72:53:B4:8A:30:F0:FD:B8:C0:
  • 3C:5A:16:9F:95:B8:24:3B:9B:37:96:70:F4:12:8E:8A:
  • 74:1D:88:F4:F5:64:60
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : ED:3C:4B:D6:E8:06:C2:A4:A2:00:57:DB:CB:24:E2:38:
  • 01:DF:51:2F:ED:C4:86:C5:70:0F:20:DD:B7:3E:3F:E0
  • Timestamp : Jun 15 11:06:29.910 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:79:51:63:4B:04:30:78:5A:D5:AC:26:0B:
  • 50:94:00:FC:76:21:65:F2:50:C2:3C:84:41:F9:5B:12:
  • 97:B8:A2:76:02:21:00:A4:04:D2:F2:87:59:0A:68:8B:
  • 60:C8:7B:C2:DF:AD:6C:28:0C:94:8A:2C:DA:1F:17:DA:
  • A9:32:BD:D4:03:0A:C9