Date: Wed, 26 Feb 2003 09:34:17 +0100 From: Andreas =?iso-8859-1?Q?Wider=F8e?= Andersen <awand@pragma.no> To: freebsd-questions@FreeBSD.ORG Subject: proto.m4 file (Sendmail on FreeBSD) Message-ID: <5.2.0.9.0.20030226082140.00b4bdb0@mail.pragma.no>
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I got Sendmail 8.12.6/8.12.7 on my FreeBSD 4.7 STABLE system and I've=20
recently been working with it to stop spam coming through to my email=20
users. I've added several "FEATURES" in the freebsd.mc file and compiled a=
=20
new sendmail.cf file which works pretty good. However, I'm seeing more and=
=20
more of lines in my maillog like the line below:
Feb 26 09:13:00 myserver sendmail[52405]: h1Q8CxZw052405:=20
<g3mek@mydomain.com>... User unknown
Feb 26 09:13:00 myserver sendmail[52405]: h1Q8CxZw052405: from=3D<>,=20
size=3D3411, class=3D0, nrcpts=3D0, proto=3DESMTP, daemon=3DMTA,=
relay=3Dmxo1.vol.cz=20
[195.250.128.76]
The spammer is always using an empty from field and the spammer is=20
obviously trying lots of different combinations just to see if it will=20
match. I read on the sendmail.org site that there is a workaround to=20
prevent spammers do this in 8.12.6.
My question is, where should I put this in in my proto.m4 file? The file is=
=20
rather large and I really don't know where.
Index: proto.m4
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /cvs/cf/m4/proto.m4,v
retrieving revision 8.649.2.12
retrieving revision 8.649.2.13
diff -u -r8.649.2.12 -r8.649.2.13
--- proto.m4 3 Dec 2002 16:48:37 -0000 8.649.2.12
+++ proto.m4 4 Dec 2002 00:12:18 -0000 8.649.2.13
@@ -1761,6 +1761,9 @@
dnl workspace: {client_name} $| {client_addr}
R$+ $| $+ $: $>D < $1 > <?> <+ Connect> < $2 >
dnl workspace: <result-of-lookup> <{client_addr}>
+dnl OR $| $+ if client_name is empty
+R $| $+ $: $>A < $1 > <?> <+ Connect> <> empty=20
client_name
+dnl workspace: <result-of-lookup> <{client_addr}>
R<?> <$+> $: $>A < $1 > <?> <+ Connect> <> no:=20
another lookup
dnl workspace: <result-of-lookup> (<>|<{client_addr}>)
R<?> <$*> $: OK found nothing
Also, there are 2 proto.m4 files:
/usr/share/sendmail/cf/m4/proto.m4
/usr/src/contrib/sendmail/cf/m4/proto.m4
Which one should I edit & use?
When I'm compiling up a new sendmail.cf file I do this:
cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.orig
cd /usr/src/etc/sendmail
cp freebsd.mc freebsd.mc.orig
[edit freebsd.mc]
make freebsd.cf
make freebsd.cf install
cd /usr/obj/usr/src/etc/sendmail/
cp freebsd.cf /etc/mail/sendmail.cf
killall -1 sendmail
Thanks!
/Andreas
---
Andreas Wider=F8e Andersen <awand@pragma.no>
Pragma AS
http://www.pragma.no=20
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