On 10 Jan 2002, Thoralf Will wrote:
> actually to backup an mbox we use rsync to copy the mail of every user
> which (sometimes) produces high load on the mailstore-servers when users
> are checking their boxes and possibly download new mail at the same
> time. (mailin, mailstore and mailout are different servers)
>
> idea: mailin delivers to mailstore, checks and if successfully written
> to mailstore - then delivers to mailbackup, otherwise reject delivery
> completely. this is necessary because we have to check quota before
> writing to mailstore.
>
> is this kind of delivery possible and how?
If both kinds of delivery are "local deliveries" in the Exim sense, i.e.
are to files or pipes, you might be able to use "shadow transports".
As you are talking about different servers here, I guess this isn't
something you can actually use.
The possibility of remote shadow transports has been on the wish list
for some time. It was essentially "impossible" in Exim 3. In Exim 4,
there is a better chance of it being implemented, but this will not
happen for some time. I'm now concentrating on getting Exim 4 completed
and released.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
