Learn how to disable Sendmail on AIX. Our Sendmail Support team is here to help you with your questions and concerns.

How to Disable Sendmail on AIX

If you’re looking to disable or stop the Sendmail service on an AIX system, our experts have put together these steps to help you out.

1. To begin with, halt the Sendmail service with this command:

   stopsrc -s sendmail
2. Next, we have to prevent automatic startup as seen below:
   • First, run the ‘smitty mktcpip` command.
   • Then, head to “SMTP System Server” and click “Communications Applications and Services”.
   • Now go to “Automatically Start Sendmail?” under “Sendmail” and set it to No.
3. Then, open the `/etc/rc.tcpip` file with a text editor and find the line starting the Sendmail daemon. Comment out this line by adding a `#` at the beginning.
4. Next, we have to check if Sendmail is configured to start via inetd. If yes, we have to disable it. This is done by editing the configuration file (`/etc/inetd.conf`) and commenting out the following line:

   smtp stream tcp nowait root /usr/sbin/startsrc in.smtpd in.smtpd -bd -q30m
5. At this point, we have to prevent the Sendmail daemon from executing by removing or renaming the binary:

   mv /usr/sbin/sendmail /usr/sbin/sendmail_backup
6. Optionally, we can choose to reboot the system to make sure the changes take effect.
7. Now, it is time to verify that Sendmail is no longer running by executing:

   ps -e | grep sendmail

Following these steps ensures the successful disabling of the Sendmail service on your AIX system. This can be particularly useful when transitioning to alternative email solutions or when Sendmail is not required for specific use cases.

[Need assistance with a different issue? Our team is available 24/7.]

Conclusion

In brief, our Support Experts demonstrated how to disable Sendmail on AIX.