On Thu, Jan 8, 2026 at 5:22 PM Viktor Dukhovni via Postfix-devel
<[email protected]> wrote:
>
> On Thu, Jan 08, 2026 at 02:49:47PM +0100, Geert Hendrickx via Postfix-devel 
> wrote:
>
> > On Thu, Jan 08, 2026 at 07:47:29 -0500, Wietse Venema via Postfix-devel 
> > wrote:
> > > Fedor Vorobev via Postfix-devel:
> > > > +#define VAR_TLS_SYSTEM_CLIST     "tls_system_cipherlist"
> > > > +#define DEF_TLS_SYSTEM_CLIST     "PROFILE=SYSTEM"
> > >
> > > Why not reuse one of the existing *_cipherlist parameters?
> > > For example, tls_medium_cipherlist = PROFILE=SYSTEM.
> >
> > Particularly since this PROFILE=SYSTEM is a Red Hat addition, it does not
> > exist in standard OpenSSL.
>
> Not only that, but Postfix by default does not load the system-wide
> "openssl.cnf" file, so I would not expect "PROFILE=SYSTEM" to work,
> unless it is somehow bolted into the OpenSSL library without needing
> any configuration file support.
>
IMHO for Fedora/RHEL downstream patched openssl it should work, but
it's a good argument that in the current state it probably isn't
useful for others/upstream.

> It is rather unclear why any of this is a good idea, the underlying
> profile is NOT designed for opportunstic TLS or the SMTP ecosystem.
>
IMHO it could be used for hardening of the submission port.

Anyway, thanks for the feedback and sorry for the noise

thanks & regards

Jaroslav

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