wietseporcupine.org (Wietse Venema) writes:

> The problem was: an alias expands into multiple addresses; one of
> them needs to be deferred; all addresses receive another copy of
> the mail.
>
> There is no need to drag into the discussion aliases that
> invoke other aliases.
> Pushing failed recipients to the defer queue means writing TODO
> destinations to queue file. This violates requirement number 4.

Now, if you could push

- only *mail* recipients (not files, not commands, no includes) as
  "todo" on the queue file

- at most a configurable amount (like 50) of "todo" recipients to the
  queue file

and resort to log the ORIGINAL (left-hand side of alias) file if at
least one of these two requirements is not met, would this meet the
"security" (#4) and "finite amount of storage" requirements? I feel it
would prevent the dupes in some cases at least, lowering the impact of
the bug.

-- 
Matthias Andree

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