SSL-Tools

SSL check results of dt.com

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Discover if the mail servers for dt.com 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, 20 Mar 2023 16:02:27 +0000

We can not guarantee a secure connection to the mailservers of dt.com!

Please contact the operator of dt.com and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/dt.com

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
d261500a.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
29 s
d261500a.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
23 s
d261500a.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
22 s
d261500b.ess.barracudanetworks.com
209.222.82.255
Results incomplete
20
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
3 s
d261500b.ess.barracudanetworks.com
209.222.82.252
Results incomplete
20
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
3 s
d261500b.ess.barracudanetworks.com
209.222.82.253
Results incomplete
20
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
3 s

Outgoing Mails

We have not received any emails from a @dt.com 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
  • ess.barracudanetworks.com
  • o.ess.barracudanetworks.com
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Common Name (CN)
  • DigiCert TLS RSA SHA256 2020 CA1
validity period
Not valid before
2022-10-17
Not valid after
2023-10-27
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
10:F8:C6:CC:21:5D:E3:5A:5D:42:D8:01:7A:D9:B4:BF:E6:D9:11:62:06:27:7F:6C:A5:9C:77:0A:E5:67:04:44
SHA1
6D:FD:60:E2:CC:8B:91:B5:9D:5B:83:F0:33:EE:AF:80:9D:5E:0A:FB
X509v3 extensions
authorityKeyIdentifier
  • keyid:B7:6B:A2:EA:A8:AA:84:8C:79:EA:B4:DA:0F:98:B2:C5:95:76:B9:F4
subjectKeyIdentifier
  • 4B:68:BE:DE:69:4B:B2:BE:E2:7A:1E:AB:05:35:A0:18:E4:9D:FB:A3
crlDistributionPoints
  • Full Name:
  • URI:http://crl3.digicert.com/DigiCertTLSRSASHA2562020CA1-4.crl
  • Full Name:
  • URI:http://crl4.digicert.com/DigiCertTLSRSASHA2562020CA1-4.crl
certificatePolicies
  • Policy: 2.23.140.1.2.2
  • CPS: http://www.digicert.com/CPS
authorityInfoAccess
  • OCSP - URI:http://ocsp.digicert.com
  • CA Issuers - URI:http://cacerts.digicert.com/DigiCertTLSRSASHA2562020CA1-1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E8:3E:D0:DA:3E:F5:06:35:32:E7:57:28:BC:89:6B:C9:
  • 03:D3:CB:D1:11:6B:EC:EB:69:E1:77:7D:6D:06:BD:6E
  • Timestamp : Oct 17 22:40:05.905 2022 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:7A:C1:C4:E9:94:CD:3A:6D:46:D9:7A:26:
  • 77:C3:09:14:C2:0E:2F:0E:DC:B4:E1:F5:53:BC:A1:90:
  • 15:A1:BE:A7:02:20:22:61:5F:05:93:C2:04:B8:A6:F6:
  • 08:D1:C2:24:14:E9:36:8D:A8:6F:F8:6C:28:10:5A:FC:
  • DA:1E:9A:8A:0D:8C
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B3:73:77:07:E1:84:50:F8:63:86:D6:05:A9:DC:11:09:
  • 4A:79:2D:B1:67:0C:0B:87:DC:F0:03:0E:79:36:A5:9A
  • Timestamp : Oct 17 22:40:06.027 2022 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:01:94:34:B1:62:B6:08:8E:DB:93:62:AA:
  • 21:87:EB:84:DB:DA:95:D4:C1:7C:2D:44:F2:16:26:E3:
  • 1A:B7:06:52:02:21:00:AB:D0:D1:3E:39:C7:A4:08:67:
  • BD:8B:14:49:00:E0:E0:2E:A4:AB:8B:08:4D:62:86:F8:
  • F1:18:E9:29:16:C0:BC
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B7:3E:FB:24:DF:9C:4D:BA:75:F2:39:C5:BA:58:F4:6C:
  • 5D:FC:42:CF:7A:9F:35:C4:9E:1D:09:81:25:ED:B4:99
  • Timestamp : Oct 17 22:40:05.972 2022 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:18:D2:2E:7F:0F:E5:6D:1C:34:91:D1:DF:
  • 5A:CD:9F:DB:0E:41:7F:21:4C:49:9D:3E:C7:EF:B2:70:
  • A0:D8:21:4D:02:21:00:C7:83:C5:52:31:DB:8A:4D:12:
  • 1B:08:FF:73:A3:20:83:3C:23:E0:2A:8B:CD:5F:F1:95:
  • A8:1A:62:1A:AC:66:36