SSL-Tools

SSL check results of letterb.in

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Discover if the mail servers for letterb.in 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, 24 May 2020 21:30:24 +0000

The mailservers of letterb.in can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @letterb.in addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.letterb.in
163.172.147.55
 5
supported
mail.letterb.in
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
12 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.letterb.in

Certificate chain
Subject
Common Name (CN)
  • mail.letterb.in
Alternative Names
  • letterb.in
  • mail.letterb.in
  • www.letterb.in
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-03-05
Not valid after
2020-06-03
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
B1:6A:4A:0D:D4:DE:3F:88:C3:FE:25:F0:D9:5C:87:A6:02:8F:32:10:74:73:B1:CF:87:9B:71:CA:65:99:E6:1B
SHA1
F6:96:FA:FB:18:00:25:97:6D:C4:DE:12:5D:99:3D:CE:BA:48:25:69
X509v3 extensions
subjectKeyIdentifier
  • 02:E3:54:D7:E5:6E:25:7B:06:1E:3B:31:19:2A:FB:A0:D2:06:BD:53
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : F0:95:A4:59:F2:00:D1:82:40:10:2D:2F:93:88:8E:AD:
  • 4B:FE:1D:47:E3:99:E1:D0:34:A6:B0:A8:AA:8E:B2:73
  • Timestamp : Mar 5 09:20:50.812 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:3F:F9:FE:92:4E:9A:5A:4A:27:78:21:0C:
  • A8:9C:A6:E1:55:22:E4:A2:1E:11:D0:EF:45:9E:CB:81:
  • 64:C2:A9:FA:02:21:00:9E:B5:EB:E8:4B:C6:DF:35:C7:
  • 92:60:16:FC:E5:8D:FA:E7:71:B0:81:E6:B1:71:67:C3:
  • 2D:F2:66:9A:28:10:6D
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
  • E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
  • Timestamp : Mar 5 09:20:50.858 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:E9:D9:F4:3D:D9:E7:2C:40:90:69:DC:
  • 29:AD:20:C3:02:CC:CD:72:C9:4E:C7:2B:A8:B1:DE:3A:
  • 4F:F2:E5:0C:0A:02:21:00:C3:D0:80:90:2E:79:07:2C:
  • 18:E8:E3:EB:C8:82:46:AC:25:17:70:24:32:2D:D6:AE:
  • 32:06:F7:E2:75:1A:CB:7C