SSL check results of iol.cz

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Discover if the mail servers for iol.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 Tue, 02 Jun 2020 00:30:10 +0000

The mailservers of iol.cz can be reached through a secure connection.

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
smtp-in.iol.cz
90.176.151.96
10
supported
smtp-in.iol.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
4 s

Outgoing Mails

We have received emails from these servers with @iol.cz sender addresses. Test mail delivery

Host TLS Version & Cipher
50.158.broadband16.iol.cz (90.183.158.50)
Insecure - not encrypted!
210.150.broadband14.iol.cz (90.181.150.210)
Insecure - not encrypted!
178.152.broadband16.iol.cz (90.183.152.178)
Insecure - not encrypted!

Certificates

First seen at:

CN=smtp-in.iol.cz,OU=Operations,O=O2 Czech Republic a.s.,L=Praha,ST=Praha,C=CZ

Certificate chain
Subject
Country (C)
  • CZ
State (ST)
  • Praha
Locality (L)
  • Praha
Organization (O)
  • O2 Czech Republic a.s.
Organizational Unit (OU)
  • Operations
Common Name (CN)
  • smtp-in.iol.cz
Alternative Names
  • smtp-in.iol.cz
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Organizational Unit (OU)
  • www.digicert.com
Common Name (CN)
  • Thawte RSA CA 2018
validity period
Not valid before
2018-12-31
Not valid after
2020-12-30
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
DC:90:93:4C:23:ED:C0:3C:A3:B7:2D:F3:FA:98:16:75:C8:A9:DF:09:87:78:D6:72:07:E1:0F:69:E5:E4:29:27
SHA1
EC:02:48:5E:70:3B:31:55:B1:E5:EB:1E:41:42:E8:AB:D8:3D:A8:A8
X509v3 extensions
authorityKeyIdentifier
  • keyid:A3:C8:5E:65:54:E5:30:78:C1:05:EA:07:0A:6A:59:CC:B9:FE:DE:5A
subjectKeyIdentifier
  • D3:56:2B:C3:FD:93:F6:04:8F:5D:E4:55:7D:6A:E1:D4:50:74:D2:B2
crlDistributionPoints
  • Full Name:
  • URI:http://cdp.thawte.com/ThawteRSACA2018.crl
certificatePolicies
  • Policy: 2.16.840.1.114412.1.1
  • CPS: https://www.digicert.com/CPS
  • Policy: 2.23.140.1.2.2
authorityInfoAccess
  • OCSP - URI:http://status.thawte.com
  • CA Issuers - URI:http://cacerts.thawte.com/ThawteRSACA2018.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
  • 25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
  • Timestamp : Dec 31 11:28:31.457 2018 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:7D:D6:2A:AA:5A:CB:52:12:F1:57:8D:3C:
  • CD:D3:AD:B9:E6:AF:72:CF:26:64:12:A0:2F:6C:17:19:
  • 33:93:61:3D:02:20:3B:88:2F:63:54:0A:2F:2D:95:9C:
  • A6:CB:F6:4E:8E:63:CD:FE:E6:61:A9:04:BA:AE:7C:92:
  • B7:62:08:73:30:4F
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 87:75:BF:E7:59:7C:F8:8C:43:99:5F:BD:F3:6E:FF:56:
  • 8D:47:56:36:FF:4A:B5:60:C1:B4:EA:FF:5E:A0:83:0F
  • Timestamp : Dec 31 11:28:31.651 2018 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:84:64:46:D9:F0:92:23:B2:83:7E:18:
  • 50:FB:7F:FE:AF:74:EE:B2:3F:72:A4:3D:FC:50:BA:E6:
  • 0E:69:4C:34:43:02:21:00:F6:84:DC:5C:A7:2A:F2:3A:
  • FA:16:1C:84:DA:93:45:C4:10:BA:9B:BF:36:31:C8:58:
  • 2D:B0:F2:BE:B4:8C:4A:F0
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77:
  • 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13
  • Timestamp : Dec 31 11:28:31.860 2018 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:BC:F9:C9:35:86:10:7A:EB:14:7C:35:
  • 39:DB:14:84:B9:AA:A5:A8:22:DD:61:EE:3C:0B:DF:1E:
  • BE:85:1A:80:99:02:21:00:CE:C1:CE:1D:E2:12:64:2E:
  • 0E:A3:1E:B9:74:6A:18:B3:53:22:60:E0:D9:D8:A1:49:
  • 2F:5F:BA:8F:D8:53:EA:A0