I'm using procmail 3.10 to process mail as it comes into my unix account,
but I need the mail to find it's way into the system mail queue. I've had
no trouble using a local (I can't create files in /var/spool) lock files,
but what if procmail tries to write system mail queue while the POP server
or mailreader is reading (and possibly deleting) mail from the queue?
Those who swap freedom for safety, deserve neither. (Benjamin Franklin)