This was written for exim3, but could surely be modified for exim4..
http://www.exim.org/exim-html-4.00/doc/html/C037.txt
On Mon, 29 Jul 2002, Sean Witham wrote:
>
>
> Philip Hazel wrote:
>
> > You can, in fact, implement exactly what you describe by getting Exim to
> > delivery mail for off-line hosts into local files. The local files are
> > then your new "queue". While the host is off-line no Exim resources are
> > used in processing this queue. You can write scripts to manage it any
> > way you like. ETRN can then re-inject these messages into Exim when the
> > host is online.
> >
>
>
> I am obviously not up to date with exim's ETRN support and how that
> can be used to trigger scripts. That aside I see no problem with the
> defered queue actually being a file, but could you then get all the
> timeout rules, return to sender bounces and other such features of
> exims queue management. I imagine someone would have to re-implement
> exim queue management but for batched files rather than the standard
> queue. To do that with scripts strikes me as a bit tricky.
>
> --Sean
>
>
>
> --
>
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