SSL-Tools

SSL check results of mail.yfx.de

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Discover if the mail servers for mail.yfx.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 Thu, 16 Oct 2025 00:30:07 +0000

We can not guarantee a secure connection to the mailservers of mail.yfx.de!

Please contact the operator of mail.yfx.de and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/mail.yfx.de

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.yfx.de
95.217.115.166
 -
supported
mail.yfx.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
6 s
mail.yfx.de
2a01:4f9:4a:311c::2
Results incomplete
- not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.yfx.de

Certificate chain
  • mail.yfx.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Expired
      • R10
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.yfx.de
Alternative Names
  • autoconfig.yfx.de
  • autodiscover.yfx.de
  • imap.yfx.de
  • mail.yfx.de
  • mailcow.yfx.de
  • smtp.yfx.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R10
validity period
Not valid before
2025-07-16
Not valid after
2025-10-14
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
46:AD:C4:88:AF:4E:A0:B0:F4:5B:EC:72:E4:12:85:FE:B4:91:03:A9:3A:25:DB:CA:37:B8:FD:88:A7:49:E0:E2
SHA1
B9:E2:4D:38:16:93:C1:B9:48:01:D7:EB:F5:C0:1D:41:47:50:24:71
X509v3 extensions
subjectKeyIdentifier
  • 30:C7:83:AF:0D:2E:2E:69:3D:95:70:5F:4D:32:E5:8C:68:DE:63:EC
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/59.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D:
  • 26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54
  • Timestamp : Jul 16 15:07:32.021 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:1C:1D:9F:58:D1:55:92:69:72:13:57:01:
  • 5E:D5:2E:F7:CF:2B:46:99:9D:08:C7:FB:16:12:E5:21:
  • FF:AD:9B:EB:02:21:00:F1:3C:67:57:5B:E6:89:75:D7:
  • 4F:6D:7E:96:89:62:73:6B:53:88:D6:27:15:F4:2C:94:
  • 4C:A2:DC:E4:70:87:50
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
  • 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
  • Timestamp : Jul 16 15:07:32.091 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:DB:E4:CF:F8:B0:2D:71:95:5A:BE:30:
  • 53:09:21:A8:23:A7:EF:70:89:CE:0C:63:DB:AB:7E:D7:
  • 18:79:74:0B:A9:02:20:10:0F:7C:9D:24:70:1B:D0:C9:
  • 09:14:AA:BB:D6:CB:1F:68:4A:51:9A:BD:01:71:BA:A1:
  • 8F:8D:64:39:46:42:C3