SSL-Tools

SSL check results of rfh-koeln.de

NEW You can also bulk check multiple servers.

Discover if the mail servers for rfh-koeln.de 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 Fri, 16 Feb 2024 15:35:55 +0000

No connection to the mailservers of rfh-koeln.de could be established.

Servers

Incoming Mails

These servers are responsible for incoming mails to @rfh-koeln.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
a1851.mx.srv.dfn.de
194.95.232.129
Results incomplete
10
supported
not checked
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
7 s
b1851.mx.srv.dfn.de
194.95.234.129
Results incomplete
10
supported
not checked
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
7 s
c1851.mx.srv.dfn.de
194.95.238.129
Results incomplete
10
supported
not checked
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
7 s

Outgoing Mails

We have not received any emails from a @rfh-koeln.de address so far. Test mail delivery

Certificates

No Certificates found

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.a1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.a1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.b1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.b1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.c1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.c1851.mx.srv.dfn.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
—