Viktor Dukhovni <[email protected]> (Do 08 Mai 2014 17:03:13 CEST):
> On Thu, May 08, 2014 at 04:43:41PM +0200, Heiko Schlittermann wrote:
> 
> > since there is currently a lot work done with respect to tls
> > information, I'd like to bring the following into discussion again.
> > 
> > What do you think about it?
> > 
> > (Viktors opinion was, that we shouldn't leave the decision about
> > aborting/continuing of the TLS session to the user, but I think, giving
> > providing this option is more in the spirit of exim.)
> 
> To be clear, I have no problem with giving users a configuration
…

> Exim SHOULD provide:
>     * User interface to require/enable/disable DANE TLS
…
> Exim SHOULD NOT require:
>     * Complex ${if ...} state-machines to perform hostname
…

I fully agree.
I'm thinking of something about that way (not sure, if I 
got the ${acl{}} feature right…

    begin acl

        acl_check_dane:
            accept verify = dane
            deny


    begin transports

        remote_smtps:
            driver = smtp
            hosts_require_tls = *
            tls_continue = ${acl{acl_check_dane}}

This give the user the power to implement whatever he wants
as the condition. 

-- 
Heiko

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