[Dovecot] alternate sendmail binary for sieve redirect OT

Hi , this isnt really a dovecot/postfix question in dove lda, there is sendmail_path = someone tried other progs here like mini_sendmail ?

http://www.acme.com/software/mini_sendmail/

i.e for using a default from forwarder address when sending redirects by sieve....is a stupid idea?

background, some other mail providers use a default sender forwarder mailaddress when redirect this may avoid problems at forwarding with spf etc

any other idea to reach this goal, pipe etc?

Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria