>Why? What problem are you trying to solve.
>if you inist, force it to go to smtpd by using a content_filter in the
>pickup service in master.cf.
The problem to be solved is that various filters we use, spamassassin, dcc,
etc., use the receive from header in order to use whitelists and such concepts.
We can't whitelist based on from, etc. since those can be forged. So, we desire
to whitelist based on sending mx. Sending MX is not available as postfix does
not add the header. Mail frro can be hundreds of domains that are local.
Those processes are running, by necessity in our case, at delivery time via
procmail, so, the mail is already processed by postfix.
