> On 17 Apr 2022, at 11:29 am, Michel <michel.sales@xxxxxxxxx> wrote: > > What a beautiful source code ! > If only all software could be written like this ! The Postfix project aims for code quality, security and backwards compatibility over hastily deployed shiny new features. You'll find many examples of careful/correct use of OpenSSL in: https://github.com/vdukhovni/postfix/tree/master/postfix/src/tls The main "limitation" to keep in mind is that the Postfix concurrency model is multi-process no multi-thread. So issues related to thread-safety don't arise and are not addressed. -- Viktor.