[Dbmail] problems piping to qmail via .qmail-default in openbsd

[aj]

Hi, I am new to dbmail, I am very interested in getting it going,
actually. I am getting a problem piping to the dbmail-smtp program via
..qmail or .qmail-default. I keep getting thus error in as qmail tries to
send the messages to dbmail-smtp. 

@400000003f0f1e3a2fabfcb4 delivery 7: deferral:
/bin/sh:_:_bad_substitution/


my .qmail-default and .qmail files are as follows:

|/usr/local/sbin/dbmail-smtp -d ${RECIPIENT:7}


thanks in advance..

-Alan