SSL-Tools

SSL check results of mailcow.oeffler.de

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Discover if the mail servers for mailcow.oeffler.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 Wed, 24 Apr 2024 20:16:24 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mailcow.oeffler.de
93.209.113.183
 -
supported
mailcow.oeffler.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
5 s

Outgoing Mails

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

Certificates

First seen at:

CN=mailcow.oeffler.de

Certificate chain
  • mailcow.oeffler.de
    • remaining
    • 256 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mailcow.oeffler.de
Alternative Names
  • mailcow.oeffler.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-04-24
Not valid after
2024-07-23
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C1:B4:84:6C:2B:5A:77:A9:68:E7:C5:60:B4:27:A8:80:D3:81:44:18:BD:66:03:46:06:8C:5C:FE:A7:63:FE:16
SHA1
42:91:EE:B6:2A:8C:82:80:FA:0F:67:5A:6C:15:54:0A:AB:0F:AD:93
X509v3 extensions
subjectKeyIdentifier
  • C3:B1:84:9E:5B:36:73:72:46:96:92:C6:80:37:C5:CC:D1:81:82:F9
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 3F:17:4B:4F:D7:22:47:58:94:1D:65:1C:84:BE:0D:12:
  • ED:90:37:7F:1F:85:6A:EB:C1:BF:28:85:EC:F8:64:6E
  • Timestamp : Apr 24 19:26:25.742 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:96:53:93:09:2F:C1:94:6D:D4:AF:86:
  • 0E:02:8E:C1:80:40:9D:63:A1:63:3A:4E:85:C2:AE:FB:
  • 1B:39:D2:A4:CF:02:20:18:36:42:4B:DF:E5:A1:68:E5:
  • 62:69:CE:01:7D:E2:B7:6F:52:60:BF:6F:79:D2:E2:2A:
  • 16:25:3E:3B:F0:DB:27
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 76:FF:88:3F:0A:B6:FB:95:51:C2:61:CC:F5:87:BA:34:
  • B4:A4:CD:BB:29:DC:68:42:0A:9F:E6:67:4C:5A:3A:74
  • Timestamp : Apr 24 19:26:25.786 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:BA:45:74:03:F9:A6:C3:13:6E:D6:D1:
  • AB:8A:E6:A9:5D:46:F4:56:44:3C:4D:FD:A9:15:14:7C:
  • A5:BD:B6:71:8C:02:20:04:BE:A0:3E:FD:29:AA:D0:3A:
  • 44:05:6C:20:9F:CD:E7:51:FF:17:31:3F:FC:D6:18:D0:
  • 24:31:5A:1D:94:52:26