SSL check results of mup.cz

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Discover if the mail servers for mup.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 Sun, 23 Feb 2020 18:09:02 +0000

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

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

/mailservers/mup.cz

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.mup.cz
2001:1568:d::114
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
mail.mup.cz
81.91.85.132
10
supported
m114.server4u.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
supported
  • SSL_RSA_WITH_RC4_128_SHA
  • SSL_RSA_EXPORT_WITH_RC4_40_MD5
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

emailAddress=extranet@mup.cz,CN=m114.server4u.cz,OU=Automatically-generated Qmail SMTP SSL key,O=Metropolitní univerzita Praha\, o. p. s.,L=Prague,ST=Czech Republic,C=CZ

Certificate chain
  • m114.server4u.cz (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority

Subject
Country (C)
  • CZ
State (ST)
  • Czech Republic
Locality (L)
  • Prague
Organization (O)
  • Metropolitní univerzita Praha, o. p. s.
Organizational Unit (OU)
  • Automatically-generated Qmail SMTP SSL key
Common Name (CN)
  • m114.server4u.cz
Email
  • extranet@mup.cz
Issuer

Certificate is self-signed.

validity period
Not valid before
2018-02-07
Not valid after
2028-02-05
Fingerprints
SHA256
BA:3F:E0:20:05:62:A2:A3:CE:68:3D:70:CF:24:74:D3:23:B8:01:D3:CA:9E:B4:FC:2A:75:14:C8:66:BF:1C:37
SHA1
5F:CC:E4:EC:AC:EF:1F:B3:31:56:4D:4F:F4:3F:86:19:5C:1E:1B:5D
X509v3 extensions
nsCertType
  • SSL Server