user maildirsmtp fail

[chenweih]

error message :
[root@head alias]# /usr/local/bin/maildirsmtp /var/qmail/alias/pppdir \
> alias-ppp- 202.96.134.132 'szptt.net.cn'
maildirserial: fatal: unable to run tcpclient: file does not exist
maildirserial: fatal: unable to run tcpclient: file does not exist
maildirserial: fatal: unable to run tcpclient: file does not exist
maildirserial: fatal: making no progress, giving up

can somebody help me?
 
chan