SSL-Tools

SSL check results of bc1.asask.co.jp

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Discover if the mail servers for bc1.asask.co.jp 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 Wed, 15 Jul 2026 03:08:33 +0000

The mailservers of bc1.asask.co.jp can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @bc1.asask.co.jp addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
bc1.asask.co.jp
203.99.245.8
 -
supported
asask.co.jp
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
11 s

Outgoing Mails

We have not received any emails from a @bc1.asask.co.jp address so far. Test mail delivery

Certificates

First seen at:

CN=asask.co.jp

Certificate chain
  • asask.co.jp
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • YE2
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • Root YE
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
              • ISRG Root X2 (Certificate is self-signed.)
                • remaining
                • 384 bit
                • ecdsa-with-SHA384
Subject
Common Name (CN)
  • asask.co.jp
Alternative Names
  • asask.co.jp
  • bc1.asask.co.jp
  • bc2.asask.co.jp
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • YE2
validity period
Not valid before
2026-07-09
Not valid after
2026-10-07
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
BB:99:4F:21:50:A9:30:E1:D6:1A:91:D6:6B:10:C7:ED:88:25:C3:F6:3A:E8:26:24:C3:F7:30:EB:CC:22:61:B3
SHA1
BA:85:34:E8:B7:91:2C:E0:63:0A:A4:54:3A:6D:76:37:B1:B0:6E:57
X509v3 extensions
subjectKeyIdentifier
  • B4:4B:D0:9F:8A:C1:3D:24:BB:ED:E2:EA:01:AE:8A:6C:A7:F3:ED:A3
authorityKeyIdentifier
  • keyid:B9:59:F2:8E:CF:22:F0:86:D3:37:48:FF:76:14:18:BA:82:D8:55:87
authorityInfoAccess
  • CA Issuers - URI:http://ye2.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://ye2.c.lencr.org/29.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB:
  • B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14
  • Timestamp : Jul 9 05:02:24.940 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:89:24:F5:32:9C:59:50:12:1B:2C:35:
  • AA:90:D9:B3:60:A1:F2:60:5A:A8:78:A2:90:47:4E:2C:
  • 7A:2A:7D:E5:54:02:20:3F:49:CE:22:00:86:1A:B4:63:
  • C6:94:A3:02:03:2E:EF:DF:3F:BA:24:E3:D7:78:F5:4A:
  • 2E:07:5C:2C:99:A6:3E
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19:
  • D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27
  • Timestamp : Jul 9 05:02:25.287 2026 GMT
  • Extensions: 00:00:05:00:13:2A:70:AE
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:92:1D:B4:EB:69:F3:3C:23:AB:58:64:
  • 72:98:E8:F6:31:63:F0:AB:59:78:5C:66:E9:5E:93:07:
  • A9:0C:23:99:DF:02:21:00:D6:6D:BF:84:B4:1B:D2:1E:
  • A4:9D:F1:9B:32:EA:23:7F:C8:76:56:5D:BF:2F:ED:96:
  • 80:8D:DC:0E:E3:78:66:3F