TLS smtp_tls_CApath and /etc/ssl/certs

[Jan C.]

Hello,
I have my postfix set up as a TLS client to other smtp servers. I
point smtp_tls_CApath to a directory where I store my own imported
trusted CAs. My question is whether or not Postfix will also load the
Root CAs stored in /etc/ssl/certs. If not, does it mean that I have to
set smtp_tls_CApath to /etc/ssl/certs and store my own root CAs there
?

Thanks for your help,

Jan.