SSL-Tools

SSL check results of edmundoptics.com.sg

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Discover if the mail servers for edmundoptics.com.sg 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 Sun, 09 Aug 2026 00:30:47 +0000

The mailservers of edmundoptics.com.sg can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @edmundoptics.com.sg addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
d216608a.ess.barracudanetworks.com
209.222.82.255
 10
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
15 s
d216608a.ess.barracudanetworks.com
209.222.82.253
 10
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
15 s
d216608a.ess.barracudanetworks.com
209.222.82.252
 10
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
15 s
d216608b.ess.barracudanetworks.com
209.222.82.252
 20
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
15 s
d216608b.ess.barracudanetworks.com
209.222.82.255
 20
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
24 s
d216608b.ess.barracudanetworks.com
209.222.82.253
 20
supported
*.ess.barracudanetworks.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
15 s

Outgoing Mails

We have not received any emails from a @edmundoptics.com.sg address so far. Test mail delivery

Certificates

First seen at:

CN=*.ess.barracudanetworks.com,O=Barracuda Networks\, Inc.,L=Campbell,ST=California,C=US

Certificate chain
Subject
Country (C)
  • US
State (ST)
  • California
Locality (L)
  • Campbell
Organization (O)
  • Barracuda Networks, Inc.
Common Name (CN)
  • *.ess.barracudanetworks.com
Alternative Names
  • *.ess.barracudanetworks.com
  • *.o.ess.barracudanetworks.com
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Common Name (CN)
  • DigiCert Global G2 TLS RSA SHA256 2020 CA1
validity period
Not valid before
2025-10-21
Not valid after
2026-11-03
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
5B:A4:67:F2:36:1D:58:70:25:01:10:37:4F:5D:C3:2C:0F:7F:07:D5:33:0B:59:62:4F:A8:0F:D0:23:A1:C7:2C
SHA1
45:33:22:A1:09:E5:A8:BF:D6:78:E3:A7:AD:D8:78:90:83:39:D4:65
X509v3 extensions
authorityKeyIdentifier
  • keyid:74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
subjectKeyIdentifier
  • 5C:0C:16:21:58:F1:4A:F7:E4:5F:14:59:11:FE:1A:92:0D:17:B7:37
certificatePolicies
  • Policy: 2.23.140.1.2.2
  • CPS: http://www.digicert.com/CPS
crlDistributionPoints
  • Full Name:
  • URI:http://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
  • Full Name:
  • URI:http://crl4.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
authorityInfoAccess
  • OCSP - URI:http://ocsp.digicert.com
  • CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9:
  • 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77
  • Timestamp : Oct 21 20:32:31.941 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:79:8F:5E:96:06:61:F8:48:71:B5:02:DC:
  • 9A:81:AE:CB:A7:0A:AA:CF:CC:1F:C1:10:C3:7E:4A:52:
  • 3F:DE:41:0D:02:21:00:94:73:0C:FC:BA:5F:DC:CF:74:
  • BA:AC:E0:C0:D2:83:C0:B8:46:5C:50:D0:9B:4A:F5:84:
  • DF:4A:E2:36:C0:F2:06
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB:
  • C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD
  • Timestamp : Oct 21 20:32:32.005 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:0B:E8:95:72:84:1A:02:5A:98:0E:1B:8A:
  • 13:C3:E9:3B:A8:42:14:25:48:FA:E2:FF:81:F4:31:59:
  • 53:DB:15:29:02:21:00:88:17:32:89:2F:59:02:F6:86:
  • EC:80:64:AA:C0:52:E1:D6:50:C3:E7:DE:ED:09:3B:9E:
  • 8B:13:68:9C:23:3B:F0
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65:
  • 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8
  • Timestamp : Oct 21 20:32:32.027 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:DA:DA:08:DA:0B:70:BF:39:2D:E8:03:
  • C2:5B:75:7E:D0:47:7E:EA:A9:2C:09:AE:A5:1E:7C:7B:
  • 96:B1:88:A3:7B:02:21:00:B9:36:DC:9A:65:2F:DF:EC:
  • A5:AA:C9:E9:E8:FE:3F:41:47:B2:5D:4D:F6:3C:A8:73:
  • 98:3F:4F:D7:08:57:93:FF