SSL check results of letterbin.io

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Discover if the mail servers for letterbin.io 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

Report created Mon, 14 Sep 2020 02:56:57 +0000

The mailservers of letterbin.io can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @letterbin.io addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.letterbin.io
206.189.247.193
5
supported
mail.letterbin.io
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.letterbin.io

Certificate chain
Subject
Common Name (CN)
  • mail.letterbin.io
Alternative Names
  • mail.letterbin.io
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-08-18
Not valid after
2020-11-16
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
09:71:2D:C3:20:D0:B5:3E:88:E8:94:3E:AB:94:F9:2E:2A:A7:B6:5D:22:D2:E1:D0:64:A6:CF:5B:33:7E:2D:52
SHA1
EF:CB:43:71:E8:9F:45:79:75:DB:17:7F:13:2E:88:43:00:B0:54:D6
X509v3 extensions
subjectKeyIdentifier
  • 4E:A1:44:CB:35:2C:F2:91:68:38:D9:5E:EE:8C:21:AF:B6:04:08:DF
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 : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77:
  • 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13
  • Timestamp : Aug 18 11:34:57.239 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:9F:53:74:83:84:6E:13:ED:A7:DF:D5:
  • D8:58:84:60:E7:64:B5:BB:82:BE:FE:DC:5C:25:98:2B:
  • 22:62:D6:5B:D9:02:20:50:9F:7D:E5:DA:36:8E:BA:4F:
  • BE:FF:0B:48:5F:08:4B:CF:E5:82:AB:66:8E:63:F1:CD:
  • 81:12:62:4C:F4:6A:D8
  • 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 : Aug 18 11:34:57.244 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:81:9D:DD:75:D1:D8:18:FA:7B:CE:92:
  • B0:5C:D8:DD:23:8B:6A:76:A1:4B:AC:8C:D0:45:E4:1C:
  • A5:93:14:FB:7D:02:20:07:B4:7C:6F:54:96:AC:7D:7F:
  • BE:8D:57:6F:4E:25:48:C1:29:0E:76:25:EF:61:F5:7E:
  • AD:71:93:DC:E1:01:1F