How does debian choose MTA?

[Edmund Lau <edlau@ucf.ics.uci.edu>]

Hi Everyone,

I'm looking for a script or a conf file that controls which MTA the system
uses to deliever mail.  I'm trying to use qmail on my system so I compiled
it from the original source.  This works fine for single users and a list,
but users' mailing lists fail if it's called from a program.

Right now I have a list edlau-test which contains:
|/usr/local/bin/procmail -Yf- (I installed my own procmail)

.procmailrc contains:
	DEFAULT=/home/edlau/Mailbox
	:0
	*
	! edlau-test1@fcbcfv.dyndns.org

edlau-test1 contains:
	edlau@ucf.ics.uci.edu (for testing purposes)

I'm suspecting a script or a conf file because the MTA that picks up the
message is either sendmail, exim, or whatevers depending on what's
installed on the system by deselect.  I've gotten rid of
/usr/sbin/sendmail but I'm still getting the same results.  Any ideas on
where to look?  Here's also a sniplet of syslog.

Thanks in advance!

-Ed

Feb 18 10:11:04 myhost tcplogd: auth connection attempt from
myhost.dyndns.org
[MY_IP]
Feb 18 10:11:04 myhost tcplogd: port 25 connection attempt from
edlau@myhost.dyndns.org [MY_IP]
Feb 18 10:11:04 myhost qmail: 950897464.723293 new msg 176208
Feb 18 10:11:04 myhost qmail: 950897464.723578 info msg 176208: bytes 498
from <edlau@myhost.dyndns.org> qp 6106 uid 71
Feb 18 10:11:04 myhost qmail: 950897464.730090 starting delivery 41: msg
176208 to local edlau-test@myhost.dyndns.org
Feb 18 10:11:04 myhost qmail: 950897464.730297 status: local 1/10 remote
0/3
Feb 18 10:11:04 myhost icmplogd: destination unreachable from localhost
[127.0.0.1]
Feb 18 10:11:05 myhost sendmail[6111]: gethostbyaddr(10.0.0.1) failed: 1
Feb 18 10:11:05 myhost sendmail[6111]: KAA06111:
to=edlau-test1@myhost.dyndns.or
g, delay=00:00:00, mailer=local, stat=User unknown
Feb 18 10:11:05 myhost sendmail[6111]: KAA06111: from=edlau, size=533,
class=0, pri=30533, nrcpts=1,
msgid=<200002181811.KAA06111@myhost.dyndns.org>,
relay=edlau@localhost
Feb 18 10:11:05 myhost qmail: 950897465.816665 delivery 41: success:
did_0+0+1/
Feb 18 10:11:05 myhost qmail: 950897465.816965 status: local 0/10 remote
0/3
Feb 18 10:11:05 myhost qmail: 950897465.817065 end msg 176208