On Wed, Sep 23, 2020 at 09:48:28AM +0100, Dominic Raferd wrote: > My mail servers, with LetsEncrypt certificates, seem to be working > perfectly (sending to, and receiving from, the world), but I have > never set any of: > > smtp_tls_CAfile > smtp_tls_CApath > smtpd_tls_CAfile > smtpd_tls_CApath > tls_append_default_CA
Congratulations you have a working system that has not been tweaked based on cargo-culting some random HOWTO. > Should I be setting any of these? No. -- Viktor.