SSL-Tools

SSL check results of postujto.cz

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Discover if the mail servers for postujto.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

JSON Refresh

Report created Mon, 21 Oct 2024 12:39:30 +0000

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

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

/mailservers/postujto.cz

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mx1.webzdarma.cz
185.64.219.11
Results incomplete
10
supported
not checked
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mx2.webzdarma.cz
167.71.49.54
 20
supported
gaja.stable.cz
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 @postujto.cz address so far. Test mail delivery

Certificates

First seen at:

emailAddress=root@gaja.stable.cz,CN=gaja.stable.cz,OU=SomeOrganizationUnit,O=SomeOrganization,L=SomeCity,C=CZ

Certificate chain
  • gaja.stable.cz (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha1WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
Subject
Country (C)
  • CZ
Locality (L)
  • SomeCity
Organization (O)
  • SomeOrganization
Organizational Unit (OU)
  • SomeOrganizationUnit
Common Name (CN)
  • gaja.stable.cz
Email
  • root@gaja.stable.cz
Issuer

Certificate is self-signed.

validity period
Not valid before
2014-05-28
Not valid after
2041-10-12
Fingerprints
SHA256
5B:56:78:FC:32:38:E4:C8:26:E8:E0:FC:39:47:A8:12:74:77:54:9B:AD:A4:1C:14:F0:62:3F:67:88:3B:7B:66
SHA1
27:CF:88:EB:4B:4A:AB:A5:81:7F:0E:CF:6E:AE:62:8D:95:B9:62:4C
X509v3 extensions
subjectKeyIdentifier
  • 5D:CA:66:79:FF:49:97:59:45:2D:3E:79:01:8A:92:95:19:09:D3:02
authorityKeyIdentifier
  • keyid:5D:CA:66:79:FF:49:97:59:45:2D:3E:79:01:8A:92:95:19:09:D3:02