Tomas Korbar:
> Hi guys,
> I created a new version of this feature which does not include
> changes in connection management code.
> Furthermore this new version adds configuration parameter
> "-o smtp_srv_resolution_allowed=yes" which enables it, so
> only users interested in SRV resolution can use it.
>
> Thanks for any review or help that you can provide.
Thanks, I'll check it out.
Wietse
> On Tue, Aug 9, 2022 at 1:53 PM Tomas Korbar <tkor...@redhat.com> wrote:
> >
> > Hi guys,
> > Thanks for your opinions and hints. I will try to come up with
> > a implementation that does not involve changes in
> > Postfix connection management code. smtp process was
> > the first place where I thought that this feature could be
> > implemented.
> >
> > On Tue, Aug 9, 2022 at 11:56 AM Wietse Venema <wie...@porcupine.org> wrote:
> > >
> > > Viktor Dukhovni:
> > > > On Mon, Aug 08, 2022 at 05:06:22PM -0400, Viktor Dukhovni wrote:
> > > >
> > > > > > We're discussing support for an MUA-specific feature, not
> > > > > > high-volime
> > > > > > MTA-to-MTA support. Connection reuse is less important, as long as
> > > > > > Postfix does not mix traffic with different authentication
> > > > > > properties,
> > > > > > and that is what SMTP_HOST_KEY is for. So if sharing is a consern,
> > > > > > just add a "comes from SRV lookup" flag to the connection cache
> > > > > > lookup key.
> > > > > >
> > > > > > > Are keys along the lines of "domain:submission+srv" too clumsy?
> > > > >
> > > > > I meant TLS policy lookup keys (smtp_tls_policy_maps). The session
> > > > > and
> > > > > connection caches are already fine, since transport name is part of
> > > > > the
> > > > > cache key.
> > > >
> > > > Also, for the caches, in addition to not getting false positives from
> > > > imprecise keys, we presumably actually want to get cache hits on the
> > > > logical destination for connection reuse, which is less likely to happen
> > > > if it splits into multiple separate nexthop values.
> > >
> > > Seriously, this is MUA submission, we don't need to optimize
> > > connection reuse for that.
> > >
> > > > And perhaps reuse may not be appropriate when the logical nexthop
> > > > destinations have different TLS policies, or different SASL settings,
> > > > ... and yet share underlying submission servers.
> > >
> > > Some kind of grouping metadata can take care of that.
> > >
> > > Wietse
> > >
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