Don't like to reply to my own email but maybe someone is interested in
my findings. As other subscribers with similar problems I got no help
from the list but I found a solution for myself although I don't know
if this solution is permanent.
The procmail recipe below caused deliver to segfault.
As I described in my previous email a core dump is produced by deliver.
I now discovered, that every delivery causes a core dump.
Before I used a procmail script like
:0 w
| $DELIVERMAIL -a $LOGNAME -m user.$LOGNAME
($DELIVERMAIL is "/usr/local/bin/deliver -r $SENDER")
Since I checked th