Disable sendmail in VPS?

TheCompWiz

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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

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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

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

TheCompWiz

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..if you have sendmail installed.
Sorry where or how to check sendmail insatlled on my vps?

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

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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

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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
 
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