Hi, I developed a S/MIME signing milter that can be used with Postfix. It features a simple map file, where you can define email addresses and corresponding certs/keys. If a mail arrives, the milter checks the MAIL FROM address and looks up the map file. If it finds a record, it signs the mail with S/MIME.
The milter is written in C++ (14. Probably 11 will work as well). I tested it on Mac OS X and Gentoo Linux. Readmes and Man-pages are included. Feel free to give it a try: https://signing-milter.org (Thanks to Andreas Schulze for the home) Code: https://github.com/croessner/sigh Feedback very welcome Christian -- Erlenwiese 14, 36304 Alsfeld T: +49 6631 78823400, F: +49 6631 78823409, M: +49 171 9905345 USt-IdNr.: DE225643613, https://www.roessner-network-solutions.com
smime.p7s
Description: S/MIME cryptographic signature
