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I try to configure my smail-system.

I want it to listen only on localhost/127.0.0.1

But when I check my system via

nmap myredirectingdomainname.com

it shows me the open port 25.

Can you help me?

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smail? Do you mean the antiquated MTA currently maintained by Greg Woods? I'd advise that you consider using a different MTA unless you have an absolute need to use smail... –  chris May 25 '10 at 20:26
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1 Answer

up vote 0 down vote accepted

You can use netstat to find out what's listening and fix that:

netstat -tpl | grep smtp
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