SSL check results of cssz.cz

NEW You can also bulk check multiple servers.

Discover if the mail servers for cssz.cz 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

Report created Thu, 12 May 2022 13:16:45 +0000

We can not guarantee a secure connection to the mailservers of cssz.cz!

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

/mailservers/cssz.cz

Servers

Incoming Mails

These servers are responsible for incoming mails to @cssz.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail01-xx.cssz.cz
2001:af0:fff4:12::41
Results incomplete
5
supported
not checked
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mail01-xx.cssz.cz
91.195.106.43
Results incomplete
5
supported
not checked
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mail01-2x.cssz.cz
2001:af0:fff6:12::41
5
supported
*.cssz.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
12 s
mail01-2x.cssz.cz
91.195.107.41
5
supported
*.cssz.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
12 s

Outgoing Mails

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

Certificates

First seen at:

OU=IT,ST=Prague,O=Ceska sprava socialniho zabezpeceni,L=Prague,CN=*.cssz.cz,C=CZ

Certificate chain
  • *.cssz.cz (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Unknown Authority

Subject
Country (C)
  • CZ
Common Name (CN)
  • *.cssz.cz
Locality (L)
  • Prague
Organization (O)
  • Ceska sprava socialniho zabezpeceni
State (ST)
  • Prague
Organizational Unit (OU)
  • IT
Issuer

Certificate is self-signed.

validity period
Not valid before
2021-01-08
Not valid after
2026-07-01
Fingerprints
SHA256
CB:BA:04:59:46:70:8B:18:73:9E:0B:6E:DF:8B:B6:A4:E9:7C:D0:71:2A:33:48:DB:B8:9E:52:43:64:6C:50:33
SHA1
C7:3A:F7:0B:C0:41:C5:2C:D1:68:D3:29:A1:09:0C:6B:78:4C:64:D2