From: Bruce Zimmer (b.r.zimmer@WORLDNET.ATT.NET)
Date: Wed Aug 21 2002 - 08:13:19 EDT
Yes,
When mail (or mailx) runs it starts a sendmail session to deliver the
mail it just created. The sendmail daemon is used for inbound (or
relayed) mail. Sendmail can in fact be run from the command line using
standard input to send mail to other systems.
Bruce Zimmer
Central Data Systems
(248) 615-4644 (direct)
(248) 705-9231 (cell)
bzimmer@centraldata.com
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
Bill Thompson
Sent: Wednesday, August 21, 2002 5:58 AM
To: aix-l@Princeton.EDU
Subject: Sendmail
Sendmail gurus,
Normally, sendmail is run as a daemon under SRC control. When I do a ps
and
grep for sendmail I see something like this:
sendmail: accepting connections on port 25
Now, I always thought this is how mail got sent and received however...
I was conducting some sendmail tests. I stopped the sendmail daemon
(stopsrc -s sendmail) and made sure it wasn't running (ps -fe | grep
sendmail). I then created and submitted for sending an email addressed
to
myself.
When I ran sendmail -bp it reported "There is 1 request in the mail
queue"
which is what I would have expected however shortly after that the email
was delivered.
I tried this a number of times with the same results. Even with the
sendmail daemon down, every email I created was delivered almost
immediately.
Ergo, my understanding of the sendmail daemon process must be in error.
Can someone explain what the sendmail daemon process is for (just
receiving
mail?) and if I leave the sendmail daemon down can I always expect
immediate delivery of emails send from the system?
The reason this is of interest is I'm trying to eliminate the daemon on
a
server that will go in our DMZ.
TIA for you help,
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