SSL-Tools

SSL check results of optisprint.net

NEW You can also bulk check multiple servers.

Discover if the mail servers for optisprint.net 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, 28 May 2020 14:37:07 +0000

We can not guarantee a secure connection to the mailservers of optisprint.net!

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

/mailservers/optisprint.net

Servers

Incoming Mails

These servers are responsible for incoming mails to @optisprint.net addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail2.optisprint.net
2a0b:6f40::15
Results incomplete
5 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
2 s
mail2.optisprint.net
212.233.128.15
 5
supported
mail2.optisprint.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
17 s
mail.optisprint.net
2a0b:6f40::15
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
2 s
mail.optisprint.net
212.233.128.15
 10
supported
mail2.optisprint.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
18 s

Outgoing Mails

We have received emails from these servers with @optisprint.net sender addresses. Test mail delivery

Host TLS Version & Cipher
mail2.optisprint.net (212.233.128.16)
TLSv1.3 TLS_AES_256_GCM_SHA384
unknown (212.233.213.29)
Insecure - not encrypted!
unknown (212.233.130.198)
Insecure - not encrypted!

Certificates

First seen at:

emailAddress=ivo_stefanoff@optisprint.net,CN=mail2.optisprint.net,OU=NOC,O=Optisprint Ltd.,L=Pleven,ST=Pleven,C=BG

Certificate chain
  • mail2.optisprint.net (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha1WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
Subject
Country (C)
  • BG
State (ST)
  • Pleven
Locality (L)
  • Pleven
Organization (O)
  • Optisprint Ltd.
Organizational Unit (OU)
  • NOC
Common Name (CN)
  • mail2.optisprint.net
Email
  • ivo_stefanoff@optisprint.net
Issuer

Certificate is self-signed.

validity period
Not valid before
2014-11-26
Not valid after
2024-11-23
Fingerprints
SHA256
AC:9A:13:DB:57:05:31:31:A0:8B:02:B6:7E:59:B2:05:D1:B3:8C:76:BB:C3:D7:61:F7:43:3F:8C:4A:89:F5:17
SHA1
16:A1:F8:37:CC:65:AF:13:26:EB:FB:B3:8A:0B:16:83:7C:7E:5F:01
X509v3 extensions
subjectKeyIdentifier
  • DB:3F:2D:A5:84:BC:0B:06:46:50:1A:72:6E:45:4E:EF:A7:1C:35:45
authorityKeyIdentifier
  • keyid:DB:3F:2D:A5:84:BC:0B:06:46:50:1A:72:6E:45:4E:EF:A7:1C:35:45