SSL-Tools

SSL check results of fritzkasten.de

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Discover if the mail servers for fritzkasten.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

JSON Refresh

Report created Wed, 06 May 2026 14:31:25 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mgw3.fritzkasten.de
2a01:4f8:c010:7eb7::100
 10
supported
mgw3.fritzkasten.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s
mgw3.fritzkasten.de
159.69.250.1
 10
supported
mgw3.fritzkasten.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s
mgw1.fritzkasten.de
144.76.86.124
 30
supported
mgw1.fritzkasten.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mgw3.fritzkasten.de

Certificate chain
  • mgw3.fritzkasten.de
    • remaining
    • 384 bit
    • ecdsa-with-SHA384
      • E7
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • ISRG Root X2 (Certificate is self-signed.)
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
Subject
Common Name (CN)
  • mgw3.fritzkasten.de
Alternative Names
  • mgw3.fritzkasten.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E7
validity period
Not valid before
2026-05-06
Not valid after
2026-08-04
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
79:E6:73:16:32:B3:67:20:A5:98:0E:79:99:89:3C:99:A3:A1:B1:72:DF:37:2D:FE:01:3A:DA:92:21:F5:0A:A9
SHA1
F7:10:7E:B7:EC:76:83:D0:AC:1F:00:EA:01:D5:37:87:70:2A:D2:21
X509v3 extensions
subjectKeyIdentifier
  • 15:FE:99:67:C8:AF:47:81:72:E7:71:82:18:57:C2:D9:C0:8B:DC:EE
authorityKeyIdentifier
  • keyid:AE:48:9E:DC:87:1D:44:A0:6F:DA:A2:E5:60:74:04:78:C2:9C:00:80
authorityInfoAccess
  • CA Issuers - URI:http://e7.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e7.c.lencr.org/73.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB:
  • 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A
  • Timestamp : May 6 13:36:45.318 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:F1:67:6B:8F:A6:20:D7:82:5E:F6:75:
  • D3:6B:BF:58:B2:88:A7:94:7B:ED:AF:E2:5E:F3:65:87:
  • B1:AA:A9:C9:F7:02:20:22:11:4F:F3:37:35:89:45:78:
  • 62:6A:54:D0:10:07:DC:2A:47:27:45:E7:D1:23:05:D5:
  • 53:66:B3:AE:51:DD:41
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 46:AF:86:3D:3B:3E:E5:9F:A5:77:DE:A8:24:5D:36:B0:
  • D9:ED:22:A2:23:F4:61:77:41:22:94:52:EE:95:50:5F
  • Timestamp : May 6 13:36:45.330 2026 GMT
  • Extensions: 00:00:05:00:05:D8:BB:92
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:89:32:14:80:09:BA:49:3E:6E:B5:94:
  • BA:54:D4:4E:3F:18:EE:E9:87:C9:02:BA:63:6D:A1:CA:
  • D2:EB:53:73:81:02:20:06:27:FE:21:2D:F5:95:02:68:
  • 48:47:3E:83:62:7F:7A:AC:8F:FA:42:21:5D:6A:7C:47:
  • B5:12:DD:2A:9B:E1:5F
First seen at:

CN=mgw1.fritzkasten.de

Certificate chain
  • mgw1.fritzkasten.de
    • remaining
    • 384 bit
    • ecdsa-with-SHA384
      • E7
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • ISRG Root X2 (Certificate is self-signed.)
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
Subject
Common Name (CN)
  • mgw1.fritzkasten.de
Alternative Names
  • mgw1.fritzkasten.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E7
validity period
Not valid before
2026-05-06
Not valid after
2026-08-04
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
EE:9C:F8:76:B9:8D:54:ED:AC:0E:A9:6B:71:42:D3:23:47:E1:5A:98:79:D1:01:41:9D:EE:37:D8:C6:F9:0F:98
SHA1
7C:F1:94:09:5B:2C:13:0C:09:04:26:71:6E:EF:88:B2:81:6C:CF:D9
X509v3 extensions
subjectKeyIdentifier
  • FD:8A:36:82:75:D4:4E:8C:49:4A:CE:99:06:D5:04:E2:4A:6B:9F:CC
authorityKeyIdentifier
  • keyid:AE:48:9E:DC:87:1D:44:A0:6F:DA:A2:E5:60:74:04:78:C2:9C:00:80
authorityInfoAccess
  • CA Issuers - URI:http://e7.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e7.c.lencr.org/26.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E:
  • F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7
  • Timestamp : May 6 13:30:12.243 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:57:D4:3A:32:BA:E7:37:F7:74:62:67:5E:
  • 68:CD:0A:F7:83:82:3D:DA:59:1F:B2:68:E4:94:1D:85:
  • EF:A7:51:F6:02:21:00:BA:59:CE:D2:B1:E8:03:EE:ED:
  • 17:F8:06:AA:C2:1B:61:F7:88:A2:EC:FE:51:0B:05:EE:
  • A8:D4:8F:D9:A9:6F:C7
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37:
  • 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23
  • Timestamp : May 6 13:30:12.219 2026 GMT
  • Extensions: 00:00:05:00:0D:F2:4C:15
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:F5:79:4E:4C:9D:2B:38:E8:62:73:11:
  • F9:F0:65:6E:C7:30:8F:C6:9C:DD:E7:67:D6:C3:7A:6D:
  • 19:1F:87:2A:DB:02:20:73:B7:F1:58:81:48:5B:96:12:
  • 57:97:70:7D:E9:D5:CA:D0:A3:BE:B2:D4:0B:7E:D3:97:
  • AC:15:71:CA:4A:13:27