On Wed, Jun 10, 2015, at 08:15 PM, Viktor Dukhovni wrote: > You should not need that. You can safely replace "smtpd_tls_req_ccert" > with "smtpd_tls_ask_ccert". Clients that don't present a certificate > will be denied access anyway.
> Also IIRC your logging reported > "Trusted" client connections, so trust path verification was working anyway. > Yes, I've the now usual ... Trusted TLS connection established ... in logs. > I would set that to "no" (safer) and avoid "req_ccert". Switch to ... -o smtpd_tls_ask_ccert=yes -o smtpd_tls_req_ccert=no -o tls_append_default_CA=no does work as promised. I was surprised that it does; simply means I don't understand the 'flow' well. Back to the docs. > Likely some other change made things work. Yes, there's that. As I read, it's likley. Many moving parts, atm ... Thanks.