OpenSMTPD table protocol changes, now with the backstory

Regular readers will be aware that OpenBSD ships with its own mail server implementation, OpenSMTPD in its base system.

In a recent message to the tech@ mailing list, Omar Polo (op@) asked for comments or oks for a patches implementing a change of table protocols. A little later, Gilles Chehade (gilles@) posted the backstory to the misc@opensmtpd.org mailing list with the backstory for this change.

The message follows in full below (apparently the otherwise fine marc.info archive site no longer archives the list):

Date: Fri, 03 May 2024 08:22:03 +0000
From: gilles@poolp.org
To: misc@opensmtpd.org
Subject: smtpd: change the table protocol

Hello,

This is a copy of a mail I sent to OpenBSD hackers a few days ago so you are aware of work
being done on OpenSMTPD by Omar Polo.

~~~

TL;DR: proposal to change table backends wire protocol to one that's closer to filters, it
       has proven to work for years now, comes with many benefits and it is a very trivial
       change that we can pull in a handful of hours:
       https://tmp.omarpolo.com/smtpd-tables.7.html

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