Sendmail Configuration in AIX

Daemon : sendmail

To start the daemon :

# startsrc -s sendmail -a "-bd -q30m"
where
bd - To start the sendmail as a SMTP mail relay router
q - Is the interval in which the sendmail daemon processes the saved messages

To start the daemon automatically after the system boot:

a. # vi /etc/rc.tcpip

b. Uncomment the below line
start /usr/lib/sendmail "$src_running" "-bd -q${qpi}"

To display the status of the daemon :

# lssrc -s sendmail
# ps -ef | grep sendmail

To stop the daemon :

# stopsrc -s sendmail
# kill -1 `cat /etc/sendmail.pid`

Configuration File:

/etc/sendmail.cf - Where the hostname, Relay server name,... are stored.

Alias File :

/etc/aliases - Where the group(alias) to member mapping is stored.


To Add the hostname in the sendmail configuration :

a. Vi /etc/sendmail.cf

b. Change "#DwYourHostName" to "Dw{hostname of local server}"

c. # refresh -s sendmail


To Add the mail (relay) server in the sendmail configuration :

a. Vi /etc/sendmail.cf

b. Change "#DSrelayhostname" to "DS{hostname of the Relay Server}"

c. # refresh -s sendmail


To send the mails,

# echo "Test Message" | sendmail -v raja@server1.domain.com

If you add any alias in /etc/aliases file, then do the following

# sendmail -bi

This will make the sendmail daemon to re-read the aliases file.

To display the list of messages in the mail queue :

# mailq (or) # sendmail -bp

Directory containing log files and temp files associated with messages in the mail queue :

/var/spool/mqueue

To delete the first 1000 messages in the root's mail queue :

# mail -u root , then enter "d 1-1000"