Date: Mon, 27 Jun 2016 12:36:46 +0100 From: Matthew Seaman <matthew@FreeBSD.org> To: freebsd-questions@freebsd.org Subject: Re: sendmail: using sendmail as submitting MTA Message-ID: <148dd628-cae1-313c-8d6b-861e30a381e3@freebsd.org> In-Reply-To: <20160627120315.36072692@freyja.zeit4.iv.bundesimmobilien.de> References: <20160627120315.36072692@freyja.zeit4.iv.bundesimmobilien.de>
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From: Matthew Seaman <matthew@freebsd.org>
To: freebsd-questions@freebsd.org
Message-ID: <148dd628-cae1-313c-8d6b-861e30a381e3@freebsd.org>
Subject: Re: sendmail: using sendmail as submitting MTA
References: <20160627120315.36072692@freyja.zeit4.iv.bundesimmobilien.de>
In-Reply-To: <20160627120315.36072692@freyja.zeit4.iv.bundesimmobilien.de>
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On 06/27/16 11:03, O. Hartmann wrote:
> I try to configure local sendmail in a way so that all email going to t=
he
> localhost are delivered to the local machine itself, but email for an e=
xternal
> email account is passed to the mail hub server. This mail hub server is=
> accessible by any host in the closed network without authentication (th=
is is
> given by a higher instance as a fact I can not change).
>=20
> I tried to figure out with the recent handbook but the explanation of h=
ow to
> configure sendmail is really poor. Since I'm not that familiar with sen=
dmail
> itself anymore, I appreciate some startups here.
Actually, you probably don't need to touch ${hostname}.submit.mc --
occasions where the default config there will need modification are few
and far between.
Yes, editing ${hostname}.mc is the correct thing to do here. sendmail
config is a fairly dark art, and you will need to refer to the
documentation. One good resource is /usr/share/sendmail/README which is
a handy guide to all the things you might put into a .mc file. However,
your best bet is to get hold of the O'Reilly sendmail book. It's a bit
of a monster, but you don't need to read the whole thing front to back:
most of the content is lists of config settings you can apply to various
different bits of the config file. Your requirement for a system that
delivers locally anything addressed to the local machine, but forwards
everything else to a smart host is certainly one of the scenarios
described in the book. Not sure about the lack of DNS around your
network: that should work, but SMTP really needs DNS working to be able
to function in general.
Cheers,
Matthew
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