SSL-Tools

SSL check results of www.diefer.de

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Discover if the mail servers for www.diefer.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 Mon, 16 Jun 2025 00:30:13 +0000

We can not guarantee a secure connection to the mailservers of www.diefer.de!

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

/mailservers/www.diefer.de

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
www.diefer.de
85.215.72.143
 -
supported
mail3.diefer.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
www.diefer.de
2a02:247a:24d:500::1
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 @www.diefer.de address so far. Test mail delivery

Certificates

First seen at:

emailAddress=admin@mail3.diefer.de,CN=mail3.diefer.de,OU=Sendmail Server,O=Sendmail

Certificate chain
  • mail3.diefer.de (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
Subject
Organization (O)
  • Sendmail
Organizational Unit (OU)
  • Sendmail Server
Common Name (CN)
  • mail3.diefer.de
Email
  • admin@mail3.diefer.de
Issuer

Certificate is self-signed.

validity period
Not valid before
2023-12-25
Not valid after
2033-12-22
Fingerprints
SHA256
E2:20:D6:11:95:DB:A2:66:50:33:F9:3C:A3:7C:56:2E:22:07:CD:4C:E2:81:40:EF:71:64:7B:8A:82:81:93:0B
SHA1
0A:6D:33:F9:86:7D:41:3A:57:E8:33:F6:EC:EB:28:1C:DB:96:0A:53