Exim error

[Eduardo <listas.linux@terra.com.br>]

Hi people, my exim (now after some more configurations done) I'm
receving this kind of error in my exim log. 
Any knows what is this ?


2003-02-25 13:38:08 18nE7f-0005Nc-00 Message is frozen
2003-02-25 13:38:08 18nDzq-0005Lu-00 Message is frozen
2003-02-25 13:38:08 End queue run: pid=8055
2003-02-25 13:39:05 18ncUL-0002aA-00 <=
bounce-debian-user=listas.linux=terra.com.br@lists.debian.org
H=localhost [127.0.0.1] P=esmtp S=5354 id=O5yiKD.A.YKE.8t5W-@murphy
2003-02-25 13:39:10 18ncUL-0002aA-00 ** |/usr/bin/procmail
<eduardo@localhost> D=userforward T=address_pipe: return message
generated
2003-02-25 13:39:15 18ncUV-0002aI-00 <= <> R=18ncUL-0002aA-00 U=mail
P=local S=6781
2003-02-25 13:39:15 18ncUL-0002aA-00 Error message sent to
bounce-debian-user=listas.linux=terra.com.br@lists.debian.org
2003-02-25 13:39:15 18ncUL-0002aA-00 Completed

And, the line:

Message is frozen 

is appearing very many times in the log, is this normal ?

Thanks

Eduardo