Amavis + Spamassassin

1. Amavis + Spamassassin

osney
(usa Outra)

Enviado em 29/07/2014 - 14:40h

Pessoal boa tarde.

Estou tendo um probleminha com meu amavis+postfix+clamav no meu ubuntu 12.04.

Meu amavis marca os spams mas não deleta ele envia para o destino e tenho a impressão que o clamav não esta detectando os virus.

Já fiz diversas configurações e continua na mesma.

Main.cf

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (xxxx)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt
smtpd_tls_key_file = /etc/ssl/private/smtpd.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

mydomain = xxxx
myhostname = mail.xxxx
alias_maps = hash:/etc/aliases
smtp_tls_security_level = may
smtpd_tls_security_level = may
smtpd_tls_auth_only = no
smtp_tls_note_starttls_offer = yes
smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
tls_random_source = dev:/dev/urandom
content_filter = smtp-amavis:[127.0.0.1]:10024
myorigin = /etc/mailname
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
relayhost = smtp.xxxxx
mynetworks = 127.0.0.0/8 192.168.0.0/24 [::1]/128 [fe80::]/64
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
home_mailbox = Maildir/
mailbox_command =
smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_tls_session_cache_timeout = 3600s
receive_override_options = no_address_mappings

master.cf

#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - - - - smtpd
-o content_filter=spamassassin
#smtp inet n - - - 1 postscreen
#smtpd pass - - - - - smtpd
#dnsblog unix - - - - 0 dnsblog
#tlsproxy unix - - - - 0 tlsproxy
submission inet n - - - - smtpd
-o content_filter=spamassassin
# -o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#smtps inet n - - - - smtpd
# -o syslog_name=postfix/smtps
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - - - - qmqpd
pickup fifo n - - 60 1 pickup
-o content_filter=
-o receive_override_options=no_header_body_checks
cleanup unix n - - - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo n - n 300 1 oqmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - - - - smtp
relay unix - - - - - smtp
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - - - - showq
error unix - - - - - error
retry unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Options for the filter
smtp-amavis unix - - n - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
-o max_use=20

# Listener for filtered mail
127.0.0.1:10025 inet n - n - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_delay_reject=no
-o smtpd_client_restrictions=permit_mynetworks,reject
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=reject_unauth_pipelining
-o smtpd_end_of_data_restrictions=
-o mynetworks=127.0.0.0/8
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o smtpd_client_connection_count_limit=0
-o smtpd_client_connection_rate_limit=0
-o receive_override_options=no_header_body_checks,no_unknown_recipient_checks

20-debian_defaults

# ADMINISTRATORS:
# Debian suggests that any changes you need to do that should never
# be "updated" by the Debian package should be made in another file,
# overriding the settings in this file.
#
# The package will *not* overwrite your settings, but by keeping
# them separate, you will make the task of merging changes on these
# configuration files much simpler...

# see /usr/share/doc/amavisd-new/examples/amavisd.conf-default for
# a list of all variables with their defaults;
# see /usr/share/doc/amavisd-new/examples/amavisd.conf-sample for
# a traditional-style commented file
# [note: the above files were not converted to Debian settings!]
#
# for more details see documentation in /usr/share/doc/amavisd-new
# and at http://www.ijs.si/software/amavisd/amavisd-new-docs.html

$QUARANTINEDIR = "$MYHOME/virusmails";
$quarantine_subdir_levels = 1; # enable quarantine dir hashing

$log_recip_templ = undef; # disable by-recipient level-0 log entries
$DO_SYSLOG = 1; # log via syslogd (preferred)
$syslog_ident = 'amavis'; # syslog ident tag, prepended to all messages
$syslog_facility = 'mail';
$syslog_priority = 'debug'; # switch to info to drop debug output, etc

$enable_db = 1; # enable use of BerkeleyDB/libdb (SNMP and nanny)
$enable_global_cache = 1; # enable use of libdb-based cache if $enable_db=1

$inet_socket_port = 10024; # default listening socket

$sa_spam_subject_tag = '***SPAM*** ';
$sa_tag_level_deflt = 3.0; # add spam info headers if at, or above that level
$sa_tag2_level_deflt = 3.0; #6.31; # add 'spam detected' headers at that level
$sa_kill_level_deflt = 100; #6.31; # triggers spam evasive actions
$sa_dsn_cutoff_level = 10; #10; # spam level beyond which a DSN is not sent

$sa_mail_body_size_limit = 200*1024; # don't waste time on SA if mail is larger
$sa_local_tests_only = 0; # only tests which do not require internet access?
# Quota limits to avoid bombs (like 42.zip)

$MAXLEVELS = 14;
$MAXFILES = 1500;
$MIN_EXPANSION_QUOTA = 100*1024; # bytes
$MAX_EXPANSION_QUOTA = 300*1024*1024; # bytes

# You should:
# Use D_DISCARD to discard data (viruses)
# Use D_BOUNCE to generate local bounces by amavisd-new
# Use D_REJECT to generate local or remote bounces by the calling MTA
# Use D_PASS to deliver the message
#
# Whatever you do, *NEVER* use D_REJECT if you have other MTAs *forwarding*
# mail to your account. Use D_BOUNCE instead, otherwise you are delegating
# the bounce work to your friendly forwarders, which might not like it at all.
#
# On dual-MTA setups, one can often D_REJECT, as this just makes your own
# MTA generate the bounce message. Test it first.
#
# Bouncing viruses is stupid, always discard them after you are sure the AV
# is working correctly. Bouncing real SPAM is also useless, if you cannot
# D_REJECT it (and don't D_REJECT mail coming from your forwarders!).

$final_virus_destiny = D_DISCARD; # (data not lost, see virus quarantine)
$final_banned_destiny = D_DISCARD; # D_REJECT when front-end MTA
$final_spam_destiny = D_DISCARD;
$final_bad_header_destiny = D_PASS; # False-positive prone (for spam)

$enable_dkim_verification = 0; #disabled to prevent warning

$virus_admin = "postmaster\@$mydomain"; # due to D_DISCARD default

# Set to empty ("") to add no header
$X_HEADER_LINE = "Debian $myproduct_name at $mydomain";

# REMAINING IMPORTANT VARIABLES ARE LISTED HERE BECAUSE OF LONGER ASSIGNMENTS

#
# DO NOT SEND VIRUS NOTIFICATIONS TO OUTSIDE OF YOUR DOMAIN. EVER.
#
# These days, almost all viruses fake the envelope sender and mail headers.
# Therefore, "virus notifications" became nothing but undesired, aggravating
# SPAM. This holds true even inside one's domain. We disable them all by
# default, except for the EICAR test pattern.
#

@viruses_that_fake_sender_maps = (new_RE(
[qr'\bEICAR\b'i => 0], # av test pattern name
[qr/.*/ => 1], # true for everything else
));

@keep_decoded_original_maps = (new_RE(
# qr'^MAIL$', # retain full original message for virus checking (can be slow)
qr'^MAIL-UNDECIPHERABLE$', # recheck full mail if it contains undecipherables
qr'^(ASCII(?! cpio)|text|uuencoded|xxencoded|binhex)'i,
# qr'^Zip archive data', # don't trust Archive::Zip
));

# for $banned_namepath_re, a new-style of banned table, see amavisd.conf-sample

$banned_filename_re = new_RE(
# qr'^UNDECIPHERABLE$', # is or contains any undecipherable components

# block certain double extensions anywhere in the base name
qr'\.[^./]*\.(exe|vbs|pif|scr|bat|cmd|com|cpl|dll)\.?$'i,

qr'\{[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}\}?$'i, # Windows Class ID CLSID, strict

qr'^application/x-msdownload$'i, # block these MIME types
qr'^application/x-msdos-program$'i,
qr'^application/hta$'i,

# qr'^application/x-msmetafile$'i, # Windows Metafile MIME type
# qr'^\.wmf$', # Windows Metafile file(1) type

# qr'^message/partial$'i, qr'^message/external-body$'i, # rfc2046 MIME types

# [ qr'^\.(Z|gz|bz2)$' => 0 ], # allow any in Unix-compressed
# [ qr'^\.(rpm|cpio|tar)$' => 0 ], # allow any in Unix-type archives
# [ qr'^\.(zip|rar|arc|arj|zoo)$'=> 0 ], # allow any within such archives
# [ qr'^application/x-zip-compressed$'i => 0], # allow any within such archives

qr'.\.(exe|vbs|pif|scr|bat|cmd|com|cpl)$'i, # banned extension - basic
# qr'.\.(ade|adp|app|bas|bat|chm|cmd|com|cpl|crt|emf|exe|fxp|grp|hlp|hta|
# inf|ins|isp|js|jse|lnk|mda|mdb|mde|mdw|mdt|mdz|msc|msi|msp|mst|
# ops|pcd|pif|prg|reg|scr|sct|shb|shs|vb|vbe|vbs|
# wmf|wsc|wsf|wsh)$'ix, # banned ext - long

# qr'.\.(mim|b64|bhx|hqx|xxe|uu|uue)$'i, # banned extension - WinZip vulnerab.

qr'^\.(exe-ms)$', # banned file(1) types
# qr'^\.(exe|lha|tnef|cab|dll)$', # banned file(1) types
);
# See http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262631
# and http://www.cknow.com/vtutor/vtextensions.htm

# ENVELOPE SENDER SOFT-WHITELISTING / SOFT-BLACKLISTING

@score_sender_maps = ({ # a by-recipient hash lookup table,
# results from all matching recipient tables are summed

# ## per-recipient personal tables (NOTE: positive: black, negative: white)
# 'user1@example.com' => [{'bla-mobile.press@example.com' => 10.0}],
# 'user3@example.com' => [{'.ebay.com' => -3.0}],
# 'user4@example.com' => [{'cleargreen@cleargreen.com' => -7.0,
# '.cleargreen.com' => -5.0}],

## site-wide opinions about senders (the '.' matches any recipient)
'.' => [ # the _first_ matching sender determines the score boost

new_RE( # regexp-type lookup table, just happens to be all soft-blacklist
[qr'^(bulkmail|offers|cheapbenefits|earnmoney|foryou)@'i => 5.0],
[qr'^(greatcasino|investments|lose_weight_today|market\.alert)@'i=> 5.0],
[qr'^(money2you|MyGreenCard|new\.tld\.registry|opt-out|opt-in)@'i=> 5.0],
[qr'^(optin|saveonlsmoking2002k|specialoffer|specialoffers)@'i => 5.0],
[qr'^(stockalert|stopsnoring|wantsome|workathome|yesitsfree)@'i => 5.0],
[qr'^(your_friend|greatoffers)@'i => 5.0],
[qr'^(inkjetplanet|marketopt|MakeMoney)\d*@'i => 5.0],
),

# read_hash("/var/amavis/sender_scores_sitewide"),

# This are some examples for whitelists, since envelope senders can be forged
# they are not enabled by default.
{ # a hash-type lookup table (associative array)
#'nobody@cert.org' => -3.0,
#'cert-advisory@us-cert.gov' => -3.0,
#'owner-alert@iss.net' => -3.0,
#'slashdot@slashdot.org' => -3.0,
#'securityfocus.com' => -3.0,
#'ntbugtraq@listserv.ntbugtraq.com' => -3.0,
#'security-alerts@linuxsecurity.com' => -3.0,
#'mailman-announce-admin@python.org' => -3.0,
#'amavis-user-admin@lists.sourceforge.net'=> -3.0,
#'amavis-user-bounces@lists.sourceforge.net' => -3.0,
#'spamassassin.apache.org' => -3.0,
#'notification-return@lists.sophos.com' => -3.0,
#'owner-postfix-users@postfix.org' => -3.0,
#'owner-postfix-announce@postfix.org' => -3.0,
#'owner-sendmail-announce@lists.sendmail.org' => -3.0,
#'sendmail-announce-request@lists.sendmail.org' => -3.0,
#'donotreply@sendmail.org' => -3.0,
#'ca+envelope@sendmail.org' => -3.0,
#'noreply@freshmeat.net' => -3.0,
#'owner-technews@postel.acm.org' => -3.0,
#'ietf-123-owner@loki.ietf.org' => -3.0,
#'cvs-commits-list-admin@gnome.org' => -3.0,
#'rt-users-admin@lists.fsck.com' => -3.0,
#'clp-request@comp.nus.edu.sg' => -3.0,
#'surveys-errors@lists.nua.ie' => -3.0,
#'emailnews@genomeweb.com' => -5.0,
#'yahoo-dev-null@yahoo-inc.com' => -3.0,
#'returns.groups.yahoo.com' => -3.0,
#'clusternews@linuxnetworx.com' => -3.0,
#lc('lvs-users-admin@LinuxVirtualServer.org') => -3.0,
#lc('owner-textbreakingnews@CNNIMAIL12.CNN.COM') => -5.0,

# soft-blacklisting (positive score)
#'sender@example.net' => 3.0,
#'.example.net' => 1.0,

},
], # end of site-wide tables
});

1; # ensure a defined return

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2. Re: Amavis + Spamassassin

foxbit3r
(usa Solaris)

Enviado em 29/07/2014 - 16:52h

Pode ser que o Spamassassin identificou o e-mail como Spam, mas para o Amavis o arquivo não é.
Vc tem de ver como fazer o Amavis identificar novos 'virus'.

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