I am also very interested by a reply of this question...
[root@sme55 qmail]# tail -f /var/log/qmail/current
@4000000047f40fff24fe19b4 delivery 161: success: did_1+0+0/
@4000000047f40fff250977dc status: local 0/10 remote 0/20
As shown above, it says I have 0 mail in remote, but in server-manager and queue visualization, I have 12 in remote queue.
Those are mainly adressed for LOCAL users...