Thank you for those links, I'll take a look.
On Tue, 13 Dec 2022 15:44:26 -0500 (EST) Wietse Venema <wie...@porcupine.org> wrote: > Wietse Venema: > > When I implemented Postfix Milter protocol support, I followed the > > file milter-protocol.txt (for protocol verion 2). > > > > For newer protocol versions I looked at the sendmail/libmilter > > source code (for data formats) and milter API documentation > > (for how it ia used). > > > > The milter API documenation can still be found for example at > > http://www.elandsys.com/resources/sendmail/libmilter/ > > https://www.ibm.com/docs/en/aix/7.2?topic=management-sendmail-mail-filter-api > > > > Forgot to mention that it is included in the Sendmail source code > at sendmail-X.Y.Z/libmilter/docs/index.html > > Wietse