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caritos
Joined: 19 Oct 2005
Posts: 7
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| Posted: Mon Nov 21, 2005 3:29 pm Post subject: Sendmail: how do you send mail from localhost only ? |
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| I want to prevent my sendmail app for being a spam agent. How do I configure sendmail so that I send mail only from localhost. |
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rjp
Joined: 15 Aug 2003
Posts: 102
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| Posted: Mon Nov 21, 2005 6:12 pm Post subject: |
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In your sendmail.mc file, you should add a line of the form:
DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
then regenerate your sendmail.cf file. Beware of the use of backquotes in m4 files - that's a backquote before the "P" in "Port".
If you already have such a line, and you don't have any other lines binding to other addresses, then this has already been done for you.
You can use netstat -ap to see what processes are listening to which ports. |
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sednet
Joined: 17 Mar 2004
Posts: 106
Location: Europe
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| Posted: Tue Nov 22, 2005 3:00 pm Post subject: Re: Sendmail: how do you send mail from localhost only ? |
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caritos wrote: I want to prevent my sendmail app for being a spam agent. How do I configure sendmail so that I send mail only from localhost.
add:
RELAY_DOMAIN(`<your IP> <your hostname> localhost 127.0.0.1')
to sendmail.mc and rebuild sendmail.cf with something like:
m4 sendmail.mc >sendmail.cf
Take some time to make sure you have it right. There are scum out there who make a living out of abusing mail servers. You can find a decent sendmail tutorial at
http://www.feep.net/sendmail/tutorial/. Or get the oreilly book. |
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