On Fri, 9 Nov 2012, Rob Shinn wrote:
On Nov 9, 2012 8:24 PM, "Jim Klimov" <[email protected]> wrote:
Back in Solaris 8 or so, the bundled sendmail included a default
smart_host definition, so that machines internal to a network
could collect and perhaps relay their messages on one dedicated
SMTP server. For this the /etc/mail/sendmail.cf file included
DSmailhost$?m.$m$.
Encouraging such laziness seems like a bad idea, IMHO. There are many
rootkits that include tools for hunting for mailservers named things like
mail, mailhost, etc.
I don't see any problem with conventions like 'mailhost'. It is
trivially easy to discover hosts which act as mail exchangers, even if
they use unusual names.
I still run sendmail here and use this stripped-down configuration for
internal hosts:
divert(0)dnl
VERSIONID(`@(#)sendmail.mc 1.11 (Sun) 06/21/04')
OSTYPE(`solaris8')dnl
DOMAIN(`solaris-generic')dnl
FEATURE(`nullclient', `mailhost$?m.$m$.')dnl
LOCAL_NET_CONFIG
R$* < @ $* .$m. > $* $#esmtp $@ $2.$m $: $1 < @ $2.$m. > $3
Oddly, I discovered that this incantation was processed into a very
broken configuration with OpenIndiana sendmail (as if the delivered m4
files were wrong) so I copied the processed configuration file from a
Solaris 10 system and then it worked just fine.
Bob
--
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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