I sent out a messge with mutt and exim. It froze because it may
have lacked my sender address. Since then I get a message every
minute like this:

  Fail Delivery S ( 5)      Message frozen

There is no indication of frozen mesasges in mail log. Resarting
exim, fetchmail and mutt had no effect

I try to remove frozen messages with

$ exim -bpr | grep frozen | awk {'print $3'} | xargs exim -Mrm
bash: exim: No such file or directory

# service exim4 restart
Stopping MTA for restart: exim4_listener.
Restarting MTA: exim4.

This has no effect. The exim -bpr command will not known

  $  ps aux | grep exim
  Debian-+ 15869  0.0  0.0  26228 14168 ?        Ss   13:14   0:00 /usr/sbin/exim4 -bd -q30m
  haines   16433  0.0  0.0   6336  2028 pts/18   S+   13:29   0:00 grep exim

  $ ps aux | grep fetchmail
  haines   14787  0.0  0.0  12776  3296 ?        Ss   13:00   0:00 fetchmail -d 30
  haines   16454  0.0  0.0   6336  1988 pts/18   S+   13:30   0:00 grep fetchmail
  You have new mail in /var/mail/haines

--

     Haines Brown