auth plugin output to stderr results in 503 error

[vislavie <vis...@gm...>]

 Hi All

I setup
netqmail-1.06 with
vpopmail-5.4.27
qmail-authentication-071
qmail-spp-042
  plugin  rblspp

It worked :-)

The smtp-daemon is running from recordio with daemontools so I can see
that the authentication works fine.

Then I tried the authlogger plugin and got the message "authlogger: pid
14000 - smtp user authenticated as xx...@xx..." that's ok and "503 you're
already authenticated (#5.5.0)" in log.
Thunderbird don't send the message and popup a window with the "503"
Server said message, Outlook shows me the loginwindow in a loop, stupid
outlook.

I wrote a testplugin, the same.
If fprinf put output to stderr the error occurs.

Any ideas?

Chears
Joc