SSL-Tools

SSL check results of mail.red-uhu.de

NEW You can also bulk check multiple servers.

Discover if the mail servers for mail.red-uhu.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, 14 Aug 2025 00:30:28 +0000

We can not guarantee a secure connection to the mailservers of mail.red-uhu.de!

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

/mailservers/mail.red-uhu.de

Servers

Incoming Mails

These servers are responsible for incoming mails to @mail.red-uhu.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.red-uhu.de
93.205.105.144
 -
supported
Mail-Srvr01.Red-Uhu.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
mail.red-uhu.de
2003:ee:ef10:3b00:dacb:8aff:fe21:c965
Results incomplete
- not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s

Outgoing Mails

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

Certificates

First seen at:

CN=Mail-Srvr01.Red-Uhu.de

Certificate chain
  • Mail-Srvr01.Red-Uhu.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
      Red-Uhu-DC-RU-HULLERN-CA
Subject
Common Name (CN)
  • Mail-Srvr01.Red-Uhu.de
Alternative Names
  • Mail-Srvr01.Red-Uhu.de
Issuer
Domain Component (DC)
  • de
  • Red-Uhu
Common Name (CN)
  • Red-Uhu-DC-RU-HULLERN-CA
validity period
Not valid before
2025-02-19
Not valid after
2027-02-19
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • 1.3.6.1.4.1.311.54.1.2
Fingerprints
SHA256
0D:21:5C:BA:AF:1E:1F:96:CF:06:08:9A:E0:37:29:9C:A5:D1:44:84:A2:1E:39:7A:72:5A:BA:D2:AA:3B:63:F2
SHA1
A3:4E:FC:BB:4A:92:32:6F:CD:5A:39:49:67:B4:BB:7E:E8:56:A3:3C
X509v3 extensions
1_3_6_1_4_1_311_21_7
  • 0..&+.....7.........]...6.......<L...M......d...
1_3_6_1_4_1_311_21_10
  • 0.0
  • ..+.......0..
  • +.....76..
SMIME-CAPS
  • 0i0...*.H.. ......0...*.H.. ......0...`.H.e...*0...`.H.e...-0...`.H.e....0...`.H.e....0...+....0
  • ..*.H.. ..
subjectKeyIdentifier
  • D1:81:B5:9C:C3:71:C9:97:4E:D9:57:3D:DB:51:21:BA:CE:95:46:D1
authorityKeyIdentifier
  • keyid:96:A9:D7:C1:8E:1F:E0:1A:DA:CB:22:F6:B1:7F:33:66:4F:92:12:0D
crlDistributionPoints
  • Full Name:
  • URI:ldap:///CN=Red-Uhu-DC-RU-HULLERN-CA,CN=DC-RU-Hullern,CN=CDP,CN=Public%20Key%20Services,CN=Services,CN=Configuration,DC=Red-Uhu,DC=de?certificateRevocationList?base?objectClass=cRLDistributionPoint
authorityInfoAccess
  • CA Issuers - URI:ldap:///CN=Red-Uhu-DC-RU-HULLERN-CA,CN=AIA,CN=Public%20Key%20Services,CN=Services,CN=Configuration,DC=Red-Uhu,DC=de?cACertificate?base?objectClass=certificationAuthority
1_3_6_1_4_1_311_25_2
  • 0?.=.
  • +.....7..../.-S-1-5-21-945673515-2755934714-1959002927-1165