Problems with rt-mailgate

When I try to send an email for commenting, the i get the following
error:

linuxtest sendmail[9925]: k4N9VXf2009923: to="|/etc/smrsh/rt-mailgate
–queue General --debug --action comment --url http://linuxtest/",
ctladdr=rt-comment@linuxtest.cpbs.at (8/0), delay=00:00:01,
xdelay=00:00:01, mailer=prog, pri=34832, dsn=4.0.0, stat=Deferred: prog
mailer (/usr/sbin/smrsh) exited with EX_TEMPFAIL

please help