I would suggest as a safer and more reliable alternative, to set up
a new transmitting server like you are thinking, but instead of
copying or sharing files (both alternatives entail non-trivial
synchronization issues), just have your existing receiving server
forward as if the transmitting server were a smart host. I.e., set up
a smart_host router rule on your existing server as explained in
section 42.1 of spec. Unlike a typical dumb mail forwarder, your
receiving server would keep all of the receiving logic.
In my experience, straight forwarding (without DNS or any other
processing) doesn't use much of your computer resources.
CJ Kucera wrote:
> Hello again list.
>
> Question: Is it possible to take a queue directory from one machine
> and have a different machine process it? I ask because we've got
> a mailserver which has been having some rather severe performance
> problems for some time now. We feel that it may have a lot to do
> with disk I/O problems, but the fact remains that we've got a spooldir
> that's many gigs large and the queue runners that we run on the server
> itself just don't get through messages quickly enough.
>
> Now, most of the messages in the queue are things that have been
> Frozen and will probably never get delivered, but we were wondering
> if it's possible to take that whole queue directory, ship it off to
> another machine, and have that machine run the queue rather than
> burdening the main system with the brunt of the processing. I took
> a look at the -D and -H files and the only place I saw that actually
> references hostnames would be the Received: headers, which would
> have a gap in them on account of the queue dir switch, but I think
> we could live with that if that's the only problem.
>
> Thanks!
>
> -CJ
>
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