Disable sendmail in VPS?

TheCompWiz · Jan 7, 2017

Is there any way to disable sendmail completely on my VPS server? and restore it if I don't want to disable this function any more.

LJSHost · Jan 7, 2017

Depends on which Linux distribution you are using but try this

To disable

/etc/init.d/sendmail stop

To Restart

/etc/init.d/sendmail start

LJSHost · Jan 7, 2017

Yes they will work with CentOs 6.x if you have sendmail installed.

Vishnu · Jan 7, 2017

You can block the port 25 in the server using firewall or iptables

TheCompWiz · Jan 8, 2017

LJSHost said:
..if you have sendmail installed.

Sorry where or how to check sendmail insatlled on my vps?

Vishnu said:
You can block the port 25 in the server using firewall or iptables

This way may be easier. how can I block port 25? and it is possible to restore it?

I have to ask way to restore because I only want to block for a while now. Sometimes I can want to roll back the default setting.

Vishnu · Jan 8, 2017

If you are using cPanel you can Install CSF Firewall and block the Port in CSF > Server configuration

or

Using IPtables you can do it by below command :

iptables -A INPUT -s 0.0.0.0 --dport 25 -j DROP

LJSHost · Jan 8, 2017

You can use ps -e | grep sendmail to see if a process called sendmail is running.

You can just block port 25 as Vishnu suggested but this will block any connection to port 25 and no mail servers will be able to connecting to your server to deliver mail on port 25

Disable sendmail in VPS?

TheCompWiz

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