On Mon, Apr 07, 2025 at 09:59:58PM +0200, Faisal Misle via mailop wrote:
> What's DMARK? I've only heard of RFC 7489 ;)

Hmph.

Domänen-basiert Mitteilungs-Authentifizierung, Reportage und Konformanz.

Natürlich.

> 
> > On Apr 7, 2025, at 9:05 PM, Klaus Ethgen via mailop <mailop@mailop.org> 
> > wrote:
> > 
> > Hi,
> > 
> > Am Mo den  7. Apr 2025 um 11:02 schrieb Jaroslaw Rafa via mailop:
> > [Automatisation of short term SSL-Cert replacement]
> > 
> > I am aware of scripts and tools to renew the certificates. But I refuse
> > to let such tools change some security stuff like certificates. Letting
> > them do that stuff I could likewise drop it completely. It is a complete
> > bankruptcy. (I hope to use that word the right way.)
> > 
> > I do not want to start a discussion about the foll of the current SSL
> > infrastructure. It is broken by design and all that stuff like short
> > running certificates or CAA makes it even worse.
> > 
> > The only solution for that would be TLSA but browsers boycott that
> > approach as it would render all that commercial CA needless.
> > 
> > In context of mail we have DANE, which is basically TLSA. So fine for
> > that area.
> > 
> >>> I have a very accurate SPF. But I refuse to use any other than `-all` as
> >>> without it, it would make SPF useless! I never ever want any other host
> >>> to send mails in my name!
> >> 
> >> I hope you are well aware of the consequences (eg. that this does break
> >> forwarding) and accept them.
> > 
> > I am.
> > 
> > Currently there are some ways around that. As SPF is only caring about
> > the envelope sender, it is enough to change that by the forwarding
> > system. Another system is SRS.
> > 
> > SPF without -all is technical useless.
> > 
> > By the way, I did not mean DKIM changing the meaning but DMARK. DMARK
> > does validate the From-header with SPF what is REALLY breaking forwards.
> > 
> >>>> * Don't do sender callout verification to SMTP servers which aren't
> >>>>   yours.
> >>> 
> >>> Why not?
> >> 
> >> Because many receiving servers now consider this as malicious activity and
> >> will put you on the blocklists if you do this.
> > 
> > Until now it didn't but I will think about that. Thanks.
> > 
> > Regards
> >   Klaus
> > --
> > Klaus Ethgen                                       http://www.ethgen.ch/
> > pub  4096R/4E20AF1C 2011-05-16            Klaus Ethgen <kl...@ethgen.ch>
> > Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C
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