SSL Certificates not working/missing


Hello Everybody

Today I configured a mailcow server for sending emails and now the ssl certificates are not working. I tested the TLS Connection with a Tool named “TLS Receiver Test” > ( and I got the error “Cert OK - failed”. Does anyone know how to fix or manually add the certificates to the webspace.

My domain is:,

It produced this output:

My operating system is (include version): Debian 8

My web server is (include version): apache2


This comment and the next one after it might be helpful:


Before we can help you in any way, we need to know how you configured the mailcow server.

Most importantly: did you set use_lets_encrypt="yes" in mailcow.config before you installed mailcow?

According to the mailcow [readme][/], you can try ./install -s again if it failed to get a certificate earlier.


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.