yes, now it works!!
So if I add /home-dir-to-vpopmail to /etc/profile
I can type the vpopmail-commands from everywhere on the commandline.
Thank you for help.
> As you see, "/usr/local/mysql/current/lib" is not checked for that file,
> so I suggest you put this directory into /etc/ld.so.conf and run
> ldconfig to update the list of shared objects.
> Use "ldconfig -v | grep libmysqlclient" to see if it's listed. Then try
> vadddomain again.