OSEC

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Re: Large messages causing "illegal seek" and "queue file write error" log entries

From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Tue Mar 06 2007 - 14:03:17 CST

On Tue, Mar 06, 2007 at 04:05:34PM +0100, Ralph Seichter wrote:

> Victor Duchovni wrote:
>
> > Is this really the best way to handle the task? Have you considered
> > splitting the large file, using scp instead of email, ...
>
> The file's size is approximately 15 MB, which I consider large for an
> email but still feasible, because the mail is only routed locally. The
> destination is a mail-in database on a Lotus Domino server, so other
> means of transport are not easily available in this case. I could use
> scp to transfer the data and write an import agent on the Domino side,
> but I'd rather rely on the existing mail connection.
>
> > Even better separate instances for inbound mail, submission and local
> > injection.
>
> I assume that by local injection you mean using sendmail? How would one
> go about configuring a Postfix instance for local injection only?

On MTAs I always install a dumb null-client instance in /etc/postfix
that handles local submission (sendmail(1)) and typically also
[127.0.0.1]:25. Real network ports are managed by additional Postfix
instances (/etc/postfix-mumble/{main,master}.cf) that have complex
configurations. The null-client instance configuration just punts all
mail to a suitable relayhost, sometimes an MTA instance on the same
machine, sometimes a central mailhub on a different machine.

--
        Viktor.

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