want to know how my machine in sending a mail
 

Hi All,

I am using a SLES 10 machine which was not configured by me. I am able to send mails from that machine but don't know which MTA it is using. I tried to look which service is listening on port 25 and found it was postfix. Then I checked main.cf file, but there is no configuration, But still I am able to send mails using mail or nail . Could someone help me with this, I can copy the contents of main.cf here is someone wants that.

Thanks

try to send a mail after stopping postfix, will it go through? If postfix is listening on port 25 so it's your MTA, in the init.d directory you can find your postfix startup script, and basically in this script you can find the location of the configuration file. Other solution to find your conf file is by running postfix with strace command.

Hi,

I checked that scrip, here is the head of that file

MASTER_BIN=/usr/lib/postfix/master
PIDFILE=/var/spool/postfix/pid/master.pid
POSTFIX_BIN=/usr/sbin/postfix
POSTCONF=/usr/sbin/postconf
OPENSLP_BIN=/usr/bin/slptool

test -x $POSTFIX_BIN || exit 5
test -x $MASTER_BIN || exit 5
test -f /etc/sysconfig/postfix && . /etc/sysconfig/postfix


Which one of them is the configuration file.