From: Wietse Venema (wietseporcupine.org)
Date: Sun Dec 02 2007 - 19:38:10 CST

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Victor Duchovni:
> On Sun, Dec 02, 2007 at 08:23:16PM -0500, Wietse Venema wrote:
>
> > > But this does not solve the multi-writer problem, so we largely get the
> > > same behaviour without the "proxy:".
> >
> > So he specifies a non-default proxymap service with
> > process limit=1.
>
> And a new map type other than "proxy:" that talks to this service rather
> than proxymap? Cloning the "proxy:" map type is a bunch of work, where's
> the win (we lose memory-only caching)?

The proxymap service with update support, is sufficient.

For SASL password failure detection, the SMTP client needs to
contact the proxymap server with update support, with a dedicated
master.cf entry that has a process limit of 1.

This provides the single-writer functionality.

No-one wants SASL password failures to be lost when Postfix
is restarted.

        Wietse

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