SSL-Tools

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

JSON Refresh

Report created Thu, 04 Mar 2021 21:55:00 +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
3 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
  • mail.letterbin.io
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • DST Root CA X3 (Certificate is self-signed.)
            • remaining
            • 2048 bit
            • sha1WithRSAEncryption
Subject
Common Name (CN)
  • mail.letterbin.io
Alternative Names
  • mail.letterbin.io
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2021-03-04
Not valid after
2021-06-02
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
97:CF:30:2B:5E:F2:89:B0:46:E9:61:44:0D:F6:FA:53:04:FE:BD:02:91:5D:30:FA:43:86:B3:77:99:D1:A2:81
SHA1
E3:01:8C:70:AF:4D:6D:58:CE:AB:28:53:31:E9:C5:0B:DD:D6:BB:24
X509v3 extensions
subjectKeyIdentifier
  • 21:B0:79:A8:B9:08:8F:0E:CB:4A:B7:40:89:1D:6F:99:61:E0:EA:26
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.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 : 44:94:65:2E:B0:EE:CE:AF:C4:40:07:D8:A8:FE:28:C0:
  • DA:E6:82:BE:D8:CB:31:B5:3F:D3:33:96:B5:B6:81:A8
  • Timestamp : Mar 4 20:19:44.326 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:E6:EB:BB:0D:6D:37:5C:C4:95:67:6B:
  • 3D:55:8B:F3:9E:E6:60:8B:53:15:63:27:24:46:72:BC:
  • DC:07:CA:FC:7D:02:21:00:80:98:16:FD:85:11:F6:90:
  • D6:0A:45:35:F4:32:03:80:F7:44:20:94:39:9D:48:BC:
  • 9E:0C:21:22:60:5B:AD:BB
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
  • E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
  • Timestamp : Mar 4 20:19:44.310 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:E4:DF:6C:0B:8F:21:D9:BD:7B:68:DF:
  • 25:AE:15:13:30:56:EE:EA:25:23:A7:74:C7:7D:E5:F2:
  • 49:1D:B1:7E:73:02:21:00:F7:E8:BC:37:73:96:C1:62:
  • E8:94:86:0D:7A:0D:7E:0D:ED:4B:00:0E:E1:C9:4C:90:
  • BF:57:FF:0C:7B:0D:96:42