Discover if the mail servers for www.offermann-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.
Report created Wed, 27 May 2020 09:35:23 +0000
Please contact the operator of www.offermann-koeln.de and ask him or her to solve this problem. This result stays accessible under the following address:
These servers are responsible for incoming mails to @www.offermann-koeln.de addresses.
|Hostname / IP address||Priority||STARTTLS||Certificates||Protocol|
We have not received any emails from a @www.offermann-koeln.de address so far. Test mail delivery