backup of namespace, is still looking at (touching?) other namespace?

[Marc Roos]

When I am doing this:

doveadm backup -f -n inbox -F /root/backup-accounts.txt 
tcp:mailxx.local:542

I am getting an error on the distributed storage, which I exactly did 
not wanted to be touched.

doveadm(testaccount): Error: remote(mailxx.local:542): User 
initialization failed: Namespace 'Archive/': 
stat(/home/mail-archive/testaccount/Archive/mailboxes) failed: 
Permission denied (euid=xxx(testaccount) egid=xx(xxxxx) missing +x perm: 
/home/mail-archive, dir owned by 0:0 mode=0700)
doveadm(testaccount): Error: remote(mailxx.local:542): dsync-server: 
User init failed
doveadm(testaccount): Error: Failed to start remote dsync-server 
command: Remote exit_code=75