HOW TO CONFIGURE SENDMAIL IN AIX OS (USING RELAYHOST MAILSERVER)

How to set sendmail in AIX


Check if sendmail is running on the AIX Server

    Run the following commands:
#lssrc -s sendmail
#ps -ef |grep sendmail


Edit the sendmail.cf and you can add in the line DS

#vi /etc/sendmail.cf

Change:
#DwYourHostName



If the sendmail is not running you can start the service with the following command


#startsrc -s sendmail -a "-bd -q30m"

Validate that sendmail is running with a ps command

#ps -ef |grep sendmail

This should echo:
root  5404     1   0 13:22:42      -  0:00 sendmail: accepting connections on port 25

- Ensure that the ‘sendmail’ daemon is started on reboot, comment in the ‘sendmail’ startup line in ‘/etc/rc.tcpip’

#vi /etc/rc.tcpip

Comment in the following line:

start /usr/lib/sendmail "$src_running" "-bd -q${qpi}"

- Create an ‘/etc/netsvc.conf’ file, this is to tell sendmail to use ‘/etc/hosts’ for DNS

#vi /etc/netsvc.conf

Add the following:
hosts=local,bind4

- Change the permissions on the ‘/etc/netsvc.conf’ file to lock down root only access:
#chmod 600 /etc/netsvc.conf