 | | | Notifications email failure | Notifications email failure 2005-08-30 - By Timothy E Miller
Back
Well, that certainly was the way it worked under Red Hat 7.3.... but
not any longer. And while I'm an idiot when it comes to sendmail
(and I actually like it that way), I just verified it too, er, the
behavior, not my idiocy...no verification needed on the latter.
RHEL3+ switched to this mail submission agent (i think that's what
it's called) model. You have a separate sendmail.cf file for
SUBMITTING email that for TRANSPORTING email. Look in /etc/mail.
submit.cf is for sending/submitting email for delivery. sendmail.cf
actually handles the transport.
Local mail does NOT get delivered if sendmail is stopped AND
submit.cf exists. I believe (and take this with a huge fat grain of
salt) that if you remove the submit.* files that behavior reverts to
the old RH7.3 ways... I think I saw that somewhere but it's 2am and
I'm in NC...so it's way late.
Now, before you freak (like I did) about running sendmail on a
non-mail server, the line (in sendmail.mc) :
DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
means that sendmail only listens on localhost and doesn't even open
a socket on any interface other than localhost.
By the way, it's yet another of Red Hat's "oh we are changing this
and not really going to advertise it anywhere" improvements. Sort
of like Qlogic HBAs in RHEL4. But that's yet another late night
rant I'm just going to shut up on.
Hope that helps.
-Tim
On Tue, 30 Aug 2005, Ken Snider wrote:
> Tim Miller wrote:
>
> >Is sendmail running? On RHEL 3/4 systems, sendmail had to be running in
> >order to send/receive mail...even locally. He mentioned he stopped a lot of
services
> >on the box...
> >
> >(Okay, technically, only the sm-client had to be running for local
deliveries I think)
> >
> >
> That's only partially true, from what I understand.
>
> Apparently sendmail does NOT have to be running, however, any delivery
> failure (anything that delays delivery) will result in the message
> ending up in the queue - which will not get run unless sendmail is running.
>
> Someone with the goods on the setup can correct me if I'm wrong.
>
> --Ken.
>
>
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Timothy E. Miller, PhD, RHCE voice: (336)758-3257
Systems Analyst Lead, High Performance Computing fax: (336)758-7127
Wake Forest University cell: (336)782-6987
Computer Science, Information Systems, Physics
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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