SSL-Tools

SSL check results of mywac.cz

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Discover if the mail servers for mywac.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 Fri, 10 Oct 2025 00:31:14 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
maildc7.mywac.cz
77.93.203.118
 10
supported
mywac.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mail2.mywac.cz
77.93.203.16
Results incomplete
20 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s

Outgoing Mails

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

Certificates

First seen at:

CN=mywac.cz

Certificate chain
  • mywac.cz
    • remaining
    • 3072 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mywac.cz
Alternative Names
  • *.mywac.cz
  • mywac.cz
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-07-21
Not valid after
2025-10-19
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
12:0D:E8:ED:FD:8C:D3:42:14:B8:DF:D0:AD:5B:5E:4E:BD:C3:B6:5A:76:77:59:1F:27:F0:30:71:AB:83:24:84
SHA1
60:FA:B1:63:F4:79:86:59:75:1E:2F:3B:96:77:F3:40:18:9F:F2:3C
X509v3 extensions
subjectKeyIdentifier
  • 4E:1F:54:CB:6F:9B:59:65:2E:85:55:ED:E1:06:6E:29:5F:03:BD:B4
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • CA Issuers - URI:http://r11.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r11.c.lencr.org/127.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 0D:E1:F2:30:2B:D3:0D:C1:40:62:12:09:EA:55:2E:FC:
  • 47:74:7C:B1:D7:E9:30:EF:0E:42:1E:B4:7E:4E:AA:34
  • Timestamp : Jul 21 05:00:21.017 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:EE:2C:65:A2:BA:12:66:B6:BD:EE:44:
  • 6B:D7:95:84:D9:BB:95:5B:3A:77:16:D1:47:03:41:B1:
  • 21:A7:02:25:23:02:20:1A:A4:33:41:5C:5C:7B:D2:7D:
  • 8B:4D:5A:69:55:6B:91:6A:4F:8E:F9:B5:3B:45:E9:38:
  • 67:C3:C8:16:A3:F8:7A
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D:
  • 26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54
  • Timestamp : Jul 21 05:00:21.017 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:2C:C0:80:60:DF:A3:EC:86:14:1E:25:07:
  • E5:2E:44:75:6A:D6:38:EC:B2:A1:46:E0:4E:0B:C0:A2:
  • AB:E4:CF:15:02:20:4F:0F:AC:E3:16:B8:04:53:F1:2D:
  • AE:2E:B7:20:F9:FE:B2:7D:08:26:47:7E:88:1D:23:BE:
  • 24:93:E5:3E:6A:27