James Feeney: > Is that what actually happens, between Postfix and a milter, > literally "sending" and "receiving" mail messages, using SMTP? If > anyone actually knows the form of that conversation between Postfix > and a milter, and what form these "mystery macro commands" might > take there, please share.
Here is a Milter prototol description. I implemented the Postfix Milter client implementation based on a version of this text. https://github.com/avar/sendmail-pmilter/blob/master/doc/milter-protocol.txt Wietse
