On Wed, Jan 29, 2014 at 10:47:07PM +0100, Klavs Klavsen wrote: > I currently employ generic rewriting of sourceaddresses, like this: > smtp_generic_maps = hash:/etc/postfix/generic > regexp:/etc/postfix/generic_regexp
As described in http://www.postfix.org/ADDRESS_REWRITING_README.html and in http://www.postfix.org/postconf.5.html#smtp_generic_maps, generic(5) rewring is done post-queue in the smtp(8) delivery agent during message delivery. While milter processing happens pre-queue as the message is received. You can either move the rewriting upstream by using virtual(5) instead (which happens before milters process the message content), or you can postpone milter processing by implementing a two stage delivery pipeline with outbound messages forwarded to a DKIM-signing MTA instance after generic rewriting. -- Viktor.
