SSL-Tools

SSL check results of color4.com.br

NEW You can also bulk check multiple servers.

Discover if the mail servers for color4.com.br 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

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Report created Fri, 24 May 2024 08:34:33 +0000

We can not guarantee a secure connection to the mailservers of color4.com.br!

Please contact the operator of color4.com.br and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/color4.com.br

Servers

Incoming Mails

These servers are responsible for incoming mails to @color4.com.br addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx1.color4.com.br
177.99.215.66
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s
mx2.color4.com.br
179.232.67.10
 20
supported
*.c4conecta.com.br
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
15 s
mx3.color4.com.br
187.45.106.198
 30
supported
*.c4conecta.com.br
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
18 s

Outgoing Mails

We have not received any emails from a @color4.com.br address so far. Test mail delivery

Certificates

First seen at:

CN=*.c4conecta.com.br,O=c4conecta.com.br,OU=Proxmox Mail Gateway

Certificate chain
  • *.c4conecta.com.br (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
Subject
Organizational Unit (OU)
  • Proxmox Mail Gateway
Organization (O)
  • c4conecta.com.br
Common Name (CN)
  • *.c4conecta.com.br
Issuer

Certificate is self-signed.

validity period
Not valid before
2023-03-16
Not valid after
2033-03-13
Fingerprints
SHA256
5E:D7:CE:1A:B1:51:C2:94:E5:12:FD:C3:6B:84:86:B4:65:57:B9:C2:48:32:6A:20:16:24:6D:43:B6:70:1B:D6
SHA1
95:D2:00:22:E8:48:61:50:0C:94:46:8F:A9:03:E8:D4:33:16:66:45