That's what I found in the exim log file. But it seems everything to works
fine. just to remind you if not known problem... :)
Sep 3 17:07:36 BlackHole exim[15792]: 2001-09-03 17:07:36 15duNz-00046M-00
Spool file is locked (another process is handling this message)
Sep 3 17:07:36 BlackHole exim[15793]: 2001-09-03 17:07:36 15duNz-00046L-00
Spool file is locked (another process is handling this message)
Sep 3 17:07:36 BlackHole exim[15794]: 2001-09-03 17:07:36 15duNz-00046K-00
Spool file is locked (another process is handling this message)