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

Report created Tue, 31 May 2016 19:28:53 +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
11.0 s

Outgoing Mails

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

Certificates

First seen at:

mail.letterb.in

Certificate chain
Subject
Common Name (CN)
  • mail.letterb.in
Alternative Names
  • mail.letterb.in
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2016-05-31
Not valid after
2016-08-29
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
73:0D:5B:7F:78:EF:06:82:8B:E1:62:53:28:5F:96:32:F7:21:A4:0D:58:F4:30:03:93:16:A7:F9:D2:4D:DD:F1
SHA1
29:4C:5A:3F:8B:F1:6E:9A:89:4A:07:C3:4C:07:C5:A4:56:0D:82:60
X509v3 extensions
subjectKeyIdentifier
  • E9:DE:44:58:84:2C:FE:22:67:A9:68:AF:CB:73:1D:99:09:51:99:6D
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
  • User Notice:
  • Explicit Text: This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/