Auto Replay error

[mamaj m]

Dear all,
I have freebsd 5.3
and i install on it open webmail 1.14 whan i  confugare the open web to auto 
replay i have this error

The original message was received at Wed, 24 May 2006 14:51:00 +0300 (EEST) 
from [10.1.1.124] with id k4OBowOq094870

   ----- The following addresses had permanent fatal errors ----- "| 
/usr/local/www/cgi-bin/openwebmail/vacation.pl -t60s -a jhon at hanan.org  
jhon"
    (expanded from: jhon at hanan-mchn.org)

   ----- Transcript of session follows ----- 550 5.7.1 
/home/hmousleh/.forward: line 1: "| 
/usr/local/www/cgi-bin/openwebmail/vacation.pl -t60s -a jhon at hanan.org  
jhon"... User jhon at server.hanan.org doesn't have a valid shell for mailing 
to programs

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