transparent proxy like smtpprox

[Lars Wilke]

Hi,

is it possible to use Qpsmtpd in a proxying mode like
smtpprox e.g. in a way that it passes SMTP commands directly
to the next hop and also does not add its own headers to
the envelope? The smtp_forward plugin just does forwarding
but i need something like smtpprox with the features of Qpsmtpd :)

thanks
   --lars