Other examples to use check_* in sendmail 8.8

Examples from Gregory Neil Shapiro

From: Gregory Neil Shapiro <gshapiro@wpi.edu>
Newsgroups: comp.mail.sendmail
Subject: Re: sendmail 8.8 and the new check_* rulesets
Date: 28 Sep 1996 10:13:11 -0400
Message-ID: <x4ranmhgnc.fsf@scooter.WPI.EDU>

bortzmeyer> (By curiosity, does anyone have used these rulesets in real world
bortzmeyer> and can provide examples? I just tried very rough setups.)

On our mail server, we block sending mail to accounts like nobody, ftp,
etc. and also block mail from junk mailers:

# Usernames that don't belong to a user and should be bounced
F{BounceNames} /shared/stations/etc/sendmail.nobody
# Junk mail sources
F{JunkMail} /shared/stations/etc/sendmail.junkmail

Scheck_rcpt
# Bounce fake usernames
R$*				$: $>3 $1
R$={BounceNames}		$#error $@ 5.2.1 $: Mailbox disabled for this username
R$={BounceNames} < @ $=w . > $*	$#error $@ 5.2.1 $: Mailbox disabled for this username

Scheck_mail
# Bounce junk mail
R$*				$: $>3 $1
R$* < @ $={JunkMail} . > $*	$#error $@ 5.7.1 $: We don't accept junk mail

On our clients, we stop outside machines from using them as a relay:

# {MXhost} class contains MX hosts
C{MXhost} smtp bigboote

Scheck_relay
# Bounce non-WPI connections
R$* $| $*		$: $>Check_MXhost $j $1 $| $2
R$* $| 130.215.$*	$@
R$* $| 127.0.0.1	$@
R$*			$#error $@ 5.7.1 $: This machine doesn't accept incoming mail.

SCheck_MXhost
R$={MXhost}.WPI.EDU $*	$@ $1.WPI.EDU $| 127.0.0.1
R$*.WPI.EDU $*		$@ $2


Subject: Re: check_* rulesets with m4 macros?
Date: 04 Oct 1996 17:57:44 -0400
Message-ID: <x4enjefl47.fsf@scooter.WPI.EDU>

jeffo> Is there a way to add the check_* rulesets to a cf file using the m4
jeffo> macros?

Here is what I do:

LOCAL_RULESETS
Scheck_rcpt
# Bounce fake usernames
R$*				$: $>3 $1
R$={BounceNames}		$#error $@ 5.2.1 $: Mailbox disabled for this username
R$={BounceNames} < @ $=w . > $*	$#error $@ 5.2.1 $: Mailbox disabled for this username

Scheck_mail
# Bounce junk mail
R$*				$: $>3 $1
R$* < @ $={JunkMail} . > $*	$#error $@ 5.7.1 $: We don't accept junk mail


Subject: Re: Sendmail 8.8.0's check_mail
Date: 06 Oct 1996 10:12:47 -0400
Message-ID: <x44tk8fag0.fsf@scooter.WPI.EDU>

andrew> This blocks sending hosts. Is it possible to block specific senders
andrew> without blocking, say, the whole of aol.com?

Actually, I added this yesterday:

# Junk mail sources
F{JunkMail} /shared/stations/etc/sendmail.junkmail

Scheck_mail
# Bounce junk mail
R<$={JunkMail}>			$#error $@ 5.7.1 $: We don't accept junk mail
R$*				$: $>3 $1
R$* < @ $={JunkMail} . > $*	$#error $@ 5.7.1 $: We don't accept junk mail

Where /shared/stations/etc/sendmail.junkmail contains:

mailer@aol.com
bigprofits.com
PhotoScan8.org
GiffyScan2.net

The first rule is used to block full addresses (mailer@aol.com) while the
third rule blocks anything from a domain.