[Esd-l] BCC Filtering

[APerson WhoIsNotSpecial]

Hello everyone,


I seem to be having a problem with the filtering at
the system here at work (domain names have been
changed to protect the innocent..)


The system is a Redhat 9 accepting mail for
ourdomain1.com, ourdomain2.com and ourdomain3.com.
sendmail-8.12.8-9.90 and procmail-3.22-9 are the
redhat rpms we have installed.
Installed also is version 1.139 of the sanitizer.


Any extra info I will glady provide. Thank you for any
advice on the subject -- I am quite baffled =)


Kind Regards and thanks,
Tomasz


/etc/mail/sendmail.mc   :  (which is rebuilt via "make
-C /etc/mail; /etc/init.d/sendmail restart")


divert(-1)dnl
dnl #
dnl # This is the sendmail macro config file for m4.
If you make changes to
dnl # /etc/mail/sendmail.mc, you will need to
regenerate the
dnl # /etc/mail/sendmail.cf file by confirming that
the sendmail-cf package is
dnl # installed and then performing a
dnl #
dnl #     make -C /etc/mail
dnl #
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for Red Hat Linux')dnl
OSTYPE(`linux')dnl
dnl #
dnl # Uncomment and edit the following line if your
outgoing mail needs to
dnl # be sent out through an external mail server:
dnl #
dnl define(`SMART_HOST',`smtp.your.provider')
dnl #
define(`confDEF_USER_ID',``8:12'')dnl
define(`confTRUSTED_USER', `smmsp')dnl
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST',true)dnl
define(`confDONT_PROBE_INTERFACES',true)dnl
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
dnl define(`STATUS_FILE', `/etc/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS',
`authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A')dnl
dnl #
dnl # The following allows relaying if the user
authenticates, and disallows
dnl # plaintext authentication (PLAIN/LOGIN) on
non-TLS links
dnl #
dnl define(`confAUTH_OPTIONS', `A p')dnl
dnl #
dnl # PLAIN is the preferred plaintext authentication
method and used by
dnl # Mozilla Mail and Evolution, though Outlook
Express and other MUAs do
dnl # use LOGIN. Other mechanisms should be used if
the connection is not
dnl # guaranteed secure.
dnl #
dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5
LOGIN PLAIN')dnl
dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI
DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
dnl #
dnl # Rudimentary information on creating certificates
for sendmail TLS:
dnl #     make -C /usr/share/ssl/certs usage
dnl #
dnl define(`confCACERT_PATH',`/usr/share/ssl/certs')
dnl
define(`confCACERT',`/usr/share/ssl/certs/ca-bundle.crt')
dnl
define(`confSERVER_CERT',`/usr/share/ssl/certs/sendmail.pem')
dnl
define(`confSERVER_KEY',`/usr/share/ssl/certs/sendmail.pem')
dnl #
dnl # This allows sendmail to use a keyfile that is
shared with OpenLDAP's
dnl # slapd, which requires the file to be readble by
group ldap
dnl #
dnl
define(`confDONT_BLAME_SENDMAIL',`groupreadablekeyfile')dnl
dnl #
dnl define(`confTO_QUEUEWARN', `4h')dnl
dnl define(`confTO_QUEUERETURN', `5d')dnl
dnl define(`confQUEUE_LA', `12')dnl
dnl define(`confREFUSE_LA', `18')dnl
define(`confTO_IDENT', `0')dnl
dnl FEATURE(delay_checks)dnl
FEATURE(`no_default_msa',`dnl')dnl
FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
FEATURE(`mailertable',`hash -o
/etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o
/etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
dnl #
dnl # The -t option will retry delivery if e.g. the
user runs over his quota.
dnl #
FEATURE(local_procmail,`',`procmail -t -Y -a $h -d
$u')dnl
FEATURE(`access_db',`hash -T<TMPF> -o
/etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
dnl EXPOSED_USER(`root')dnl
dnl #
dnl # The following causes sendmail to only listen on
the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices.
Remove the loopback
dnl # address restriction to accept email from the
internet or intranet.
dnl #
DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl
dnl #
dnl # The following causes sendmail to additionally
listen to port 587 for
dnl # mail from MUAs that authenticate. Roaming users
who can't reach their
dnl # preferred sendmail daemon due to port 25 being
blocked or redirected find
dnl # this useful.
dnl #
dnl DAEMON_OPTIONS(`Port=submission, Name=MSA,
M=Ea')dnl
dnl #
dnl # The following causes sendmail to additionally
listen to port 465, but
dnl # starting immediately in TLS mode upon
connecting. Port 25 or 587 followed
dnl # by STARTTLS is preferred, but roaming clients
using Outlook Express can't
dnl # do STARTTLS on ports other than 25. Mozilla Mail
can ONLY use STARTTLS
dnl # and doesn't support the deprecated smtps;
Evolution <1.1.1 uses smtps
dnl # when SSL is enabled-- STARTTLS support is
available in version 1.1.1.
dnl #
dnl # For this to work your OpenSSL certificates must
be configured.
dnl #
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
dnl #
dnl # The following causes sendmail to additionally
listen on the IPv6 loopback
dnl # device. Remove the loopback address restriction
listen to the network.
dnl #
dnl # NOTE: binding both IPv4 and IPv6 daemon to the
same port requires
dnl #       a kernel patch
dnl #
dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6,
Family=inet6')dnl
dnl #
dnl # We strongly recommend not accepting unresolvable
domains if you want to
dnl # protect yourself from spam. However, the laptop
and users on computers
dnl # that do not have 24x7 DNS do need this.
dnl #
FEATURE(`accept_unresolvable_domains')dnl
dnl #
dnl FEATURE(`relay_based_on_MX')dnl
dnl #
dnl # Also accept email sent to
"localhost.localdomain" as local email.
dnl #
LOCAL_DOMAIN(`localhost.localdomain')dnl
dnl #
dnl # The following example makes mail from this host
and any additional
dnl # specified domains appear to be sent from
mydomain.com
dnl #
MASQUERADE_AS(`ourdomain1.com')dnl
dnl #
dnl # masquerade not just the headers, but the
envelope as well
dnl #
FEATURE(masquerade_envelope)dnl
dnl #
dnl # masquerade not just @mydomainalias.com, but
@*.mydomainalias.com as well
dnl #
dnl FEATURE(masquerade_entire_domain)dnl
dnl #
MASQUERADE_DOMAIN(`localhost')dnl
MASQUERADE_DOMAIN(`localhost.localdomain')dnl
dnl MASQUERADE_DOMAIN(`newhorizons.com.au')dnl
dnl MASQUERADE_DOMAIN(`helium.newhorizons.com.au')dnl
MAILER(smtp)dnl
MAILER(procmail)dnl


LOCAL_CONFIG
CPprocmail


LOCAL_RULE_0
R$*<@$=w>$*             $#procmail
$@/etc/procmail/filter.rc $:$1<@$2.procmail.>$3
R$*<@$=w.>$*    $#procmail $@/etc/procmail/filter.rc
$:$1<@$2.procmail.>$3
R$*<@$*.procmail.>$*    $1<@$2.>$3


MAILER_DEFINITIONS
Mprocmail,      P=/usr/bin/procmail, F=DFMmShun,
S=11/31, R=21/31, T=DNS/RFC822/X-Unix,
        A=procmail -m $h $g $u




/etc/procmail/filter.rc



################################################################
#
# procmail rules to filter mail on a gateway
#
PATH="/bin:/usr/bin:$PATH:/usr/local/bin"
SHELL=/bin/sh
LOGFILE=/var/log/procmail.log
NL="
"
LOGABSTRACT=no


# Configuration settings go here...
# See the discussion of what to put in /etc/procmailrc
at
#
http://www.impsec.org/email-tools/sanitizer-configuration.html
# /etc/procmailrc is the "master procmail script" for
local
# delivery, this file is the "master procmail script"
for relay
# The settings in one DO NOT affect the other.


SECURITY_NOTIFY="root"
#SECURITY_NOTIFY_VERBOSE=
#SECURITY_NOTIFY_SENDER=/etc/procmail/nhh.txt
STRIPPED_WARNING="WARNING!
An attachment has been stripped from this email for
security purposes.
Please see IT if this is a problem.
"
SECURITY_LOCAL_POSTMASTER=admin at ourdomain1.com
SECURITY_QUARANTINE=/var/spool/mail/quarantine
POISONED_SCORE=25
SECURITY_POISON_WINEXE=YES
MTA_FLAGS_CMDLN=" "


POISONED_EXECUTABLES=/etc/procmail/poisoned
MANGLE_EXTENSIONS='html?|exe|com|cmd|bat|pif|sc[rt]|lnk|dll|ocx|p[po]t|rtf|vb[se]?|hta|p[lm]|sh[bs]|hlp|chm|eml|ws[cfh]|ad[ep]|jse?|md[abew]|ms[ip]|reg|as[dfx]|c[ip]l|wm[avszd]|vcf|nws|wsz|\{[-0-9a-f]+\}|mpg|mpeg|avi'
STRIPPED_EXECUTABLES="/etc/procmail/stripped"


# etc... - you NEED to put configuration settings
here.
# NB: DO NOT enable RECIPIENT notification on a
relay...


# run the sanitizer
INCLUDERC=/etc/procmail/html-trap.procmail
INCLUDERC=/etc/procmail/local-rules.procmail


# send the mail on to the next relay
:0
! -oi -f "$@"


#
################################################################



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