Wrong outgoing email addresses


I’m running rt2.0 with postfix 1.1 and Apache 1.3. Whenever rt tries
to send a mail to a requestor or a watcher it sets the from header of the email to @mydomain.ldt and not to
@mydomain.ldt .

I’ve searched the list archives and found similiar problems with rt3.0 and
postfix. With rt3.0 the solution seemed to be to add the -f flag to the
sendmail calls in SendEmail.pm and Email.pm . Is this the same for rt2.0 ?
I’m not really familiar with perl so I would really appreciate a hint how
to add this flag to the perl code.