authentication problem on port 587

[John Borhek]

This is the exact symptom I experienced after trying (unsuccessfully)to 
configure new certs on Kolab. Unfortunately, there does not seem to be a 
list anywhere of all the places/certs or symlinks that need to be 
edited.

My solution was a complete fresh install of Kolab where I took the 
/etc/pki folder it its entirety and copied it to my working (dev) Kolab. 
So I am back to self-signed certs with the hostname 
localhost.localdomain - at least I am able to use Roundcube. I will 
trade the hostname and CA SSL's for Roundcube any day!