Date: Mon, 5 May 1997 00:17:06 +0800 (WST) From: Adrian Chadd <adrian@obiwan.psinet.net.au> To: freebsd-hackers@freebsd.org Subject: Re: Sendmail.cf patch #2.. Message-ID: <Pine.BSF.3.95q.970505001353.1937A-100000@obiwan.psinet.net.au> In-Reply-To: <Pine.BSF.3.95q.970504231019.819A-100000@obiwan.psinet.net.au>
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On Sun, 4 May 1997, Adrian Chadd wrote:
> Heres the updated patch of mine that does exactly what the first one did,
> but this one rejects mail if the MAIL FROM: doesn't resolve.
> (Read the patch for more details)
Me and diff don't mix.. esp at this time of night (twice in a row.. :)
Try this one:
--- /etc/sendmail.cf Sun May 4 13:25:35 1997
+++ sendmail.cf Sun May 4 11:03:06 1997
@@ -85,6 +85,21 @@
# ... define this only if sendmail cannot automatically determine your domain
#Dj$w.Foo.COM
+# Both these files are basic text files, one host or user@host per line
+# a list of known spammers, user@host form one per line
+F{Spammer}/etc/sendmail/spammers
+
+# A list of domains to completely block, one per line
+F{SpamDomains}/etc/sendmail/spamdomains
+
+Kdequote dequote
+# Localdomains is a plaintext list of domains we accept mail for, including
+# virtual domains
+F{LocalDomains}/etc/sendmail/virtdomains
+# Contains a plaintext list of IPs we will relay mail for, can be X.Y.Z to
+# cover a whole class C..
+F{LocalNetworks}/etc/sendmail/localnetworks
+
CP.
@@ -914,3 +929,59 @@
R$+ $: $>61 $1
R$+ $: $>93 $1
+
+
+
+# blocking of spammers at MAIL From: and forcing DNS resolve
+# (note - this is incompatible with the DeliveryMode=defer option, since
+# it requires that a DNS lookup be done immediately upon mail receipt.
+
+Scheck_mail
+# Check for valid domain name
+R$* $: <?> $>3 $1
+R<?> $* < @ $+ . > $: <OK>
+R<?> $* < @ $+ > $#error $: 451 Domain must resolve
+
+
+# Check against spammer list
+R<$={Spammer}> $#error $@ 5.7.1 $: "571 We don't accept junk mail"
+R$* $: $>3 $1
+R$*<@$={SpamDomains}.>$* $#error $@ 5.7.1 $: "571 We don't accept junk mail from your domain"
+R$*<@*$={SpamDomains}>$* $#error $@ 5.7.1 $: "571 We don't accept junk mail from your domain"
+R$={Spammer} $#error $@ 5.7.1 $: "571 We don't accept junk mail from your domain"
+
+
+
+#
+# check_rcpt
+#
+Scheck_rcpt
+
+# mail terminating locally is ok
+R$*$={LocalDomains}$* $@ OK
+
+# adding the client's domain name...
+R$* $: $(dequote "" $&{client_name} $) $| $1
+
+# directly invoked (no client name) is ok
+R $| $* $@ OK
+
+# we will relay mail from clients in our own domain
+R$*$={LocalDomains}$* $| $* $@ OK
+
+# adding the client's ip number...
+R$* $: $(dequote "" $&{client_addr} $) $| $1
+
+# directly invoked (no ip address) is ok
+R0 $| $* $| $* $@ OK
+
+# we will relay all mail from clients on our own networks
+R$*$={LocalNetworks}$* $| $* $| $* $@ OK
+
+# or from localhost
+R$*127.0.0.1$* $| $* $| $* $@
+
+# anything else is bogus
+R$* $#error $: "550 Relay Denied"
+
+
help
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