Re: presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-24 Thread Lars Kollstedt
Hi Viktor, at first thank you for your two answers. I decided to keep my reactions to them in order but in all in this answer. ;-) On Friday, 22. November 2019, 23:29:46 CET Viktor Dukhovni wrote: > Have you recently seen MX hosts that solicit client certs and then abort > the TLS handshake when

Re: presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-24 Thread Viktor Dukhovni
On Sun, Nov 24, 2019 at 09:45:20PM +0100, Lars Kollstedt wrote: > We've someone running > > smtpd_tls_received_header=yes > smtpd_tls_ask_ccert = yes > smtpd_tls_CApath=/etc/ssl/certs > > on his Postfix MX servers in our nearer environment, but I don't want > to maintain a list of all his domai

Re: presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-24 Thread Lars Kollstedt
Am Freitag, 22. November 2019, 23:08:39 CET schrieb Ralph Seichter: > * Lars Kollstedt: > > is there a clean way to optionally present a client certificate to a > > Postfix MX [...] > > I hope I don't misinterpret your question here. [...] > However, I don't see you using relay_clientcerts=/path/

Re: presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-22 Thread Viktor Dukhovni
On Fri, Nov 22, 2019 at 12:11:21PM +0100, Lars Kollstedt wrote: > Is there a clean way to optionally present a client certificate to a > Postfix MX without breaking the use of TLS or even the mail delivery > to MXes that are verifying presented client certificates against a > local CA, and rejecti

Re: presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-22 Thread Ralph Seichter
* Lars Kollstedt: > is there a clean way to optionally present a client certificate to a > Postfix MX [...] I hope I don't misinterpret your question here. When acting as an SMTP client, Postfix should present the certificate you have defined via smtp_tls_cert_file if the receiving Postfix (the S

presenting TLS Client Certificates without breaking TLS to mixed MSA/MX

2019-11-22 Thread Lars Kollstedt
Hello List, is there a clean way to optionally present a client certificate to a Postfix MX configured with smtpd_tls_received_header=yes smtpd_tls_ask_ccert = yes smtpd_tls_CApath=/etc/ssl/certs without breaking the use of TLS or even the mail delivery to MXes that are verifying presented cl