On Sat, Aug 07, 2021 at 11:10:39AM +0100, Chris Bamford wrote:
> I would like to know how Postfix handles client certificates for delivery
> i.e. when it makes a remote connection to deliver email.
>
> Is it possible to control the certificate that is used per domain?
Wietse posted a detailed walk through for per *sender* domain client
certs. The short answer is that:
* Client certificates are per-transport. Multiple TLS client certs
require multiple smtp/unix transports.
* You can choose the transport by destination domain, and/or partition
the choice of default transport by sender domain.
--
VIktor.
