Hi, Could someone tell me how to install something to prevent messages like this being sent through our server -

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I have tryed installing the patches from the cobalt site but the control panel wont accept it .... Please help!.

You mean that the pop3-before-smtp-relay package didn't work on your server?

If that specifically does not work (one of its flavour found in ftp://ftp.cobaltnet.com/pub/contrib/binaries/), you cannot do much beside not offering outgoing mail to your clients, or only allowing specific IPs to use smtp.

There is also the option of shutting it down completely :)

And how would i shut down out going mail completly? They would still be able to send mail via there own isp though?

Yes, they would.

If you log in telnet or ssh on your server, do the following to shut sendmail down:
su
[root pass]
/etc/rc.d/init.d/sendmail stop

This sill shut it down for now. If you want to temporarily shut it down, move that file (/etc/rc.d/init.d/sendmail) someplace else and it will not get restarted next time you reboot.

However, I am not sure that the scripts normally using sendmail (perl, asp, php scripts) will work anymore.

Instead, I suggest applying a rule denying every IP to your mail server and only allowing localhost adn the few ips that you trust not to spam.

This is done in the control panel >> mail server.

Instead, I suggest applying a rule denying every IP to your mail server and only allowing localhost adn the few ips that you trust not to spam.

This is done in the control panel >> mail server.

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Don't fully get this part .... if i put localhost and a few ips wouldnt anyone be able to use it since its localhost?

Whic ones do i remove the ips and domains from?

Relay for the following Hosts/Domains

Host/Domain Aliases

or do i remove from both of them?

If you have POP-Auth installed then you shouldn't have *any*thing in these fields. The POP-Auth will take care of letting people in who have accounts there.

By default, the server does not allow mail to be sent through it, so you've done something (either pop-auth or the two things you mentioned) to allow it.

Well when i create an account it puts them in there. So if i removed them all everything would be ok?. Not actually put any in there myself.

I'm sorry, I thought you meant you added *other* domains/IPs there. Yes, those are added when you create domains.

Read Felix's posts and ignore what I said (it doesn't apply here).