How to restore Internal nethserver ssl as default

[mrmarkuz (Markus Neuberger)]

Please check messages log for more info about the error.

To reset to Nethserver self signed cert:

Update break mail module

In the past this worked to reset certificate settings and fallback to self-signed cert: config show pki #just to know current settings config setprop pki CrtFile '' config setprop pki KeyFile '' config setprop pki ChainFile '' signal-event certificate-update