From owner-freebsd-questions  Fri Mar 29 15:11:46 2002
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Date: Fri, 29 Mar 2002 18:11:33 -0500 (EST)
From: Peter Leftwich <Hostmaster@Video2Video.Com>
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To: Bryan Crowley <crowleybryan@eircom.net>
Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG>
Subject: Re: Sendmail question - block users from sending email to internet
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On Sat, 30 Mar 2002, Bryan Crowley wrote:
> Hi - I would like block all/some users sending email to internet and receive email from internet. I am setting up a Freebsd box for lectures to faclate their sysablus but only want the users to be able to mail local users on the box. I am using FreeBSD v1.5. Any help would be graciously accepted.
> Best Regards
> Bryan

Check out "man sendmail" especially and http://www.sendmail.org but for now
this should get you started:

In /etc/mail/sendmail.cf you might see two lines like this:
# Hosts for which relaying is permitted ($=R)
FR-o /etc/mail/relay-domains

mypromt$ cat /etc/mail/relay-domains
# Mail relay access control list.  Default is to reject mail unless the
# destination is local, or listed in /etc/mail/local-host-names
#cyberspammer.com               550 We don't accept mail from spammers
#FREE.STEALTH.MAILER@           550 We don't accept mail from spammers
#another.source.of.spam         REJECT
#okay.cyberspammer.com          OK
#128.32                         RELAY
localhost                       RELAY
127.0.0.1                       RELAY

--
Peter Leftwich
President & Founder
Video2Video Services
Box 13692, La Jolla, CA, 92039 USA
+1-413-403-9555


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