MailScanner is leaving sendmail qf-Files behind

[Sebastian Wiesinger]

Hi, I asked this some time ago, but now the problem appears again.
MailScanner doesn't delete some qf-files from the incoming queue after delivering
a message:

Jan 14 18:32:33 postoffice sm-mta[24906]: i0EHWWTi024906: from=<bounce-debian-isp=sw=internetx.de at lists.debian.org>, size=4833, class=-30, nrcpts=1, msgid=<PbU65B.A.PhE.b0XBAB at murphy>, proto=ESMTP, daemon=MTA, relay=gate2.mailgate.de [62.116.129.39]
Jan 14 18:32:33 postoffice MailScanner[19732]: New Batch: Found 7 messages waiting
Jan 14 18:32:33 postoffice MailScanner[19732]: New Batch: Forwarding 3 unscanned messages, 30633 bytes
Jan 14 18:32:33 postoffice MailScanner[19732]: Spam Checks: Starting
Jan 14 18:32:33 postoffice MailScanner[19732]: Unscanned: Delivered 3 messages
Jan 14 18:32:33 postoffice MailScanner[19732]: Virus and Content Scanning: Starting
Jan 14 18:32:34 postoffice sendmail[24913]: i0EHWWTi024906: to=<xya at localhost>, delay=00:00:01, xdelay=00:00:00, mailer=local, pri=176347, dsn=2.0.0, stat=Sent

After this, the file qfi0EHWWTi024906 remains in mqueue.in.

The first time I posted this, it was assumed to be a sendmail problem,
but as sendmail has completed delivery of the mail it must be
MailScanner who leaves behind this queuefile....

It leaves approx. 6-12 files per day.

Greetings
Sebastian