SSL-Tools

SSL check results of pop3.m-zone.cz

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Discover if the mail servers for pop3.m-zone.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, 19 May 2025 00:31:18 +0000

The mailservers of pop3.m-zone.cz can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @pop3.m-zone.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
pop3.m-zone.cz
109.224.64.8
 -
supported
mail.mnetstudenka.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
12 s

Outgoing Mails

We have not received any emails from a @pop3.m-zone.cz address so far. Test mail delivery

Certificates

First seen at:

CN=mail.mnetstudenka.cz

Certificate chain
  • mail.mnetstudenka.cz
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R10
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.mnetstudenka.cz
Alternative Names
  • imap.m-zone.cz
  • imap.mnetstudenka.com
  • imap.mnetstudenka.cz
  • imap.mpssystems.cz
  • imap.steelio.cz
  • mail.m-zone.cz
  • mail.mnetstudenka.com
  • mail.mnetstudenka.cz
  • mail.mpssystems.cz
  • mail.steelio.cz
  • pop3.m-zone.cz
  • pop3.mnetstudenka.com
  • pop3.mnetstudenka.cz
  • pop3.mpssystems.cz
  • pop3.steelio.cz
  • smtp.m-zone.cz
  • smtp.mnetstudenka.com
  • smtp.mnetstudenka.cz
  • smtp.mpssystems.cz
  • smtp.steelio.cz
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R10
validity period
Not valid before
2025-05-15
Not valid after
2025-08-13
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
4C:87:41:9E:A3:AA:6E:93:39:32:3E:F0:5D:89:79:0E:24:B7:B7:A5:14:75:5F:47:87:EC:3C:A5:62:23:1B:33
SHA1
DD:A1:0C:60:F2:42:E5:E7:DE:C3:BA:09:35:70:E0:4D:B9:0D:AE:23
X509v3 extensions
subjectKeyIdentifier
  • 36:7A:4A:DF:DB:F6:86:56:59:C3:C5:B6:25:FC:FC:1D:F7:23:B9:41
authorityKeyIdentifier
  • keyid:BB:BC:C3:47:A5:E4:BC:A9:C6:C3:A4:72:0C:10:8D:A2:35:E1:C8:E8
authorityInfoAccess
  • CA Issuers - URI:http://r10.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r10.c.lencr.org/14.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
  • 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
  • Timestamp : May 15 06:39:11.186 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:56:0E:91:A9:F6:30:60:B0:A9:FB:6E:B6:
  • BE:0C:76:A9:86:D7:87:86:19:40:8F:B1:AE:20:B5:3A:
  • D3:85:19:FA:02:20:18:A6:CF:26:FC:D2:D5:EC:17:9D:
  • 37:AB:10:1C:B6:3B:1D:48:D1:10:17:73:C2:0A:19:5A:
  • 5F:DC:EB:88:F1:FE
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : DD:DC:CA:34:95:D7:E1:16:05:E7:95:32:FA:C7:9F:F8:
  • 3D:1C:50:DF:DB:00:3A:14:12:76:0A:2C:AC:BB:C8:2A
  • Timestamp : May 15 06:39:11.235 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:88:25:E5:2D:8B:35:DB:F5:D4:4C:01:
  • 15:B3:DA:B3:C0:83:21:B1:CA:49:F6:BB:90:28:60:CB:
  • 01:AE:38:BB:ED:02:20:4B:E8:FB:8B:88:D6:19:AF:29:
  • 1B:BE:1B:31:A2:70:B0:D4:BB:28:DF:49:15:A1:58:4D:
  • 7B:5F:69:F6:01:FB:48