Date: Sat, 23 Sep 2000 21:54:48 +0200 From: Neil Blakey-Milner <nbm@mithrandr.moria.org> To: Lyndon Nerenberg <lyndon@orthanc.ab.ca> Cc: Nate Williams <nate@yogotech.com>, Warner Losh <imp@village.org>, security@FreeBSD.ORG, Peter Wemm <peter@netplex.com.au> Subject: Re: sendmail default run state Message-ID: <20000923215447.A44016@mithrandr.moria.org> In-Reply-To: <200009231941.e8NJfV143262@orthanc.ab.ca>; from lyndon@orthanc.ab.ca on Sat, Sep 23, 2000 at 01:41:31PM -0600 References: <20000923021119.A35919@mithrandr.moria.org> <200009231941.e8NJfV143262@orthanc.ab.ca>
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On Sat 2000-09-23 (13:41), Lyndon Nerenberg wrote:
> Neil> How do you enable nullclient from rc.conf?
>
> Ship the system with two pre-built sendmail configuration files:
>
> /etc/mail/sendmail.cf.{full,nullclient}
>
> In rc.conf:
>
> sendmail_config="full" # Set to "nullclient" if you want to
> # forward all local mail to a central
> # mail hub. Set sendmail_smarthost
> # to the name of your mail hub.
> sendmail_smarthost="mail.example.com"
>
> Change the code fragment in /etc/rc where sendmail is started to:
>
> rm -f /etc/mail/smarthost
> if [ -n "${sendmail_smarthost} ] ; then
> echo "${sendmail_smarthost" > /etc/mail/smarthost
> fi
> if [ -r /etc/mail/sendmail.cf.${sendmail_config} ] ; then
> echo -n ' sendmail'
> /usr/sbin/sendmail ${sendmail_flags} -C/etc/mail/sendmail.cf.${sendmail_config}
> fi
>
> sendmail.cf.nullclient would have an entry that picked up the smarthost
> from the contents of /etc/mail/smarthost.
Brilliant! Is that with 'DS-o /etc/mail/smarthost'?
Now, if we could make that 'listen' thing (OOAddr=10.1.1.1) take a file,
we're set.
I'm not so sure about /etc/rc deleting and recreating files in
/etc/mail, though, but that's another issue.
> Neil> What happens if your smarthost server goes down - when does
> Neil> sendmail check your queue again?
>
> Whenever you tell it to via the -q parameter. E.g.:
>
> /usr/sbin/sendmail -q20m
Yeah - I was commenting on why you want sendmail running with queue
running.
> It's not that hard. In fact there are quite a few things we could do
> to allow for things like a SUBMIT only configuration (listen to port
> 587, but not port 25), etc. The problem is they would be very specific
> to sendmail.
I don't use sendmail for "mail servers" personally, but it makes sense
if they're standalone machines that just need to send mail from the
machine to a central server. If we can offer this ability in the base
system and easy-to-use from rc.conf, that's cool. More complex stuff
requires direct sendmail configuration, or installing another MTA.
Neil
--
Neil Blakey-Milner
Sunesi Clinical Systems
nbm@mithrandr.moria.org
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