On Mon, Jul 29, 2024 at 10:21:22AM -0400, Wietse Venema via Postfix-users wrote:
> Viktor Dukhovni via Postfix-users:
> > On Mon, Jul 29, 2024 at 03:48:42PM +0200, Jaroslaw Rafa via Postfix-users
> > wrote:
> >
> > > Isn't there any possibility to use a dedicated transport to such a broken
> > > server, with settings that force use of TLS to deliver the message
> > > regardless of target server not advertising it?
> >
> > No, because the servers in question not only don't offer STARTTLS in
> > EHLO, but also refuse STARTTLS if you try. There aren't many such
> > systems, but they exist. Perhaps not the OP's issue, but it is a
> > remote possibility.
>
> Would smtp_reply_filter do the job?
Only if the broken system in question actually allows STARTTLS, the ones
I recall seeing required, but did not support STARTTLS, yes, they
effectively refused to receive email.
--
Viktor.
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