Add spam management to the email configs

2021-05-30 15:19:42 -04:00 · 2021-05-30 15:19:42 -04:00 · 4c327333c9
commit 4c327333c9
parent de2b2e78d0
4 changed files with 881 additions and 11 deletions
--- a/README.md
+++ b/README.md
@ -47,11 +47,11 @@ nginx php systemd
 ### Package Requirements for Mail Server
-dovecot postfix procmail opendkim
+dovecot postfix procmail opendkim amavisd-new spamassassin unrar p7zip
 ### Folders for Mail Server
-dovecot pam.d postfix procmailrc skel systemd opendkim
+amavisd dovecot pam.d postfix procmailrc skel systemd opendkim
 ### Setup Instructions for Mail Server
@ -60,20 +60,21 @@ dovecot pam.d postfix procmailrc skel systemd opendkim
 3. Add an A DNS record for the FQDN and a hostname for the server
 4. Set the hostname of the server with `hostnamectl set-hostname SOMETHING.REPLACEME.TLD` where `SOMETHING` is a unique name for the server and `REPLACEME.TLD` is the domain. This will be the server's new hostname.
 5. Add the hostname of the server to the end of the line starting with `127.0.0.1` in `/etc/hosts`
-6. In `/etc/dovecot/dovecot.conf` and `/etc/opendkim/opendkim.conf` replace occurances of `REPLACEME.TLD` with the domain, and occurances of `REPLACEME` with the first part of the domain
+6. In `/etc/amavisd/amavisd.conf`, `/etc/dovecot/dovecot.conf` and `/etc/opendkim/opendkim.conf` replace occurances of `REPLACEME.TLD` with the domain, and occurances of `REPLACEME` with the first part of the domain
 7. In `/etc/postfix/main.cf` replace `SOMETHING.REPLACEME.TLD` with the hostname of the server and `REPLACEME.TLD` with the domain
 8. Run `opendkim-genkey -r -s REPLACEME -d REPLACEME.TLD` where `REPLACEME.TLD` is the domain, and `REPLACEME` is the first part of the domain
 9. In `/etc/postfix/aliases`, replace the instance of `REPLACEME` with the user that should receive domain-level emails
 10. Run `openssl dhparam -out /etc/dovecot/dh.pem 4096`
 11. Run `newaliases` to update the aliases database with the contents of `/etc/postfix/aliases`
-12. Run `systemctl start postfix dovecot opendkim` to start the mail services and `systemctl status postfix dovecot opendkim` to check for errors
+12. Run `sa-update` to update spamassassin
-13. If there were no errors in the previous command, run `systemctl enable postfix dovecot opendkim` to enable the mail services at boot
+13. Run `systemctl start amavisd postfix dovecot opendkim` to start the mail services and `systemctl status amavisd postfix dovecot opendkim` to check for errors
-14. Create an MX DNS record for `REPLACEME.TLD` containing the hostname (`REPLACEME.TLD` can usually be left out of the input field)
+14. If there were no errors in the previous command, run `systemctl enable amavisd postfix dovecot opendkim` to enable the mail services at boot
-15. Create a TXT DNS record for the host `REPLACEME._domainkey.REPLACEME.TLD` containing `v=DKIM1; k=rsa; s=email; p=PASSWORD`, replacing the occurance of `REPLACEME` with the first part of the domain, `REPLACEME.TLD` with the full domain, and `PASSWORD` with the string following `p=` in `/etc/opendkim/REPLACEME.txt` (`REPLACEME.TLD` can usually be left out of the input field)
+15. Create an MX DNS record for `REPLACEME.TLD` containing the hostname (`REPLACEME.TLD` can usually be left out of the input field)
-16. Create a TXT DNS record for the host `REPLACEME.TLD` containing `v=spf1 mx -all` (`REPLACEME.TLD` can usually be left out of the input field)
+16. Create a TXT DNS record for the host `REPLACEME._domainkey.REPLACEME.TLD` containing `v=DKIM1; k=rsa; s=email; p=PASSWORD`, replacing the occurance of `REPLACEME` with the first part of the domain, `REPLACEME.TLD` with the full domain, and `PASSWORD` with the string following `p=` in `/etc/opendkim/REPLACEME.txt` (`REPLACEME.TLD` can usually be left out of the input field)
-17. Create a TXT DNS record for the host `_dmarc.REPLACEME.TLD` containing `v=DMARC1; p=none` (`REPLACEME.TLD` can usually be left out of the input field)
+17. Create a TXT DNS record for the host `REPLACEME.TLD` containing `v=spf1 mx -all` (`REPLACEME.TLD` can usually be left out of the input field)
-18. Set the reverse DNS record for the VPS to the hostname
+18. Create a TXT DNS record for the host `_dmarc.REPLACEME.TLD` containing `v=DMARC1; p=none` (`REPLACEME.TLD` can usually be left out of the input field)
-19. Add `postfix.service` and `dovecot.service` to the `ExecStartPost` service reload in `/etc/systemd/system/certbot-renewal.service` and run `systemctl daemon-reload`
+19. Set the reverse DNS record for the VPS to the hostname
 20. Add `postfix.service` and `dovecot.service` to the `ExecStartPost` service reload in `/etc/systemd/system/certbot-renewal.service` and run `systemctl daemon-reload`
 ### Add Accounts
--- a/amavisd/amavisd.conf
+++ b/amavisd/amavisd.conf
@ -0,0 +1,822 @@
 use strict;
 # a minimalistic configuration file for amavisd-new with all necessary settings
 #
 #   see amavisd.conf-default for a list of all variables with their defaults;
 #   for more details see documentation in INSTALL, README_FILES/*
 #   and at http://www.ijs.si/software/amavisd/amavisd-new-docs.html
 # COMMONLY ADJUSTED SETTINGS:
@bypass_virus_checks_maps = (1);  # controls running of anti-virus code
 # @bypass_spam_checks_maps = (1);  # controls running of anti-spam code
 # $bypass_decode_parts = 1;         # controls running of decoders&dearchivers
 # $myprogram_name = $0; # set to 'amavisd' or similar to avoid process name
                        # truncation in /proc/<pid>/stat and ps -e output
 $max_servers = 2;            # num of pre-forked children (2..30 is common), -m
 $daemon_user  = 'amavis';     # (no default;  customary: vscan or amavis), -u
 $daemon_group = 'amavis';     # (no default;  customary: vscan or amavis), -g
 $mydomain = 'REPLACEME.TLD';   # a convenient default for other settings
 $MYHOME = '/var/spool/amavis';   # a convenient default for other settings, -H
 $TEMPBASE = "$MYHOME/tmp";   # working directory, needs to exist, -T
 $ENV{TMPDIR} = $TEMPBASE;    # environment variable TMPDIR, used by SA, etc.
 $QUARANTINEDIR = "$MYHOME/virus";  # -Q
 # $quarantine_subdir_levels = 1;  # add level of subdirs to disperse quarantine
 # $release_format = 'resend';     # 'attach', 'plain', 'resend'
 # $report_format  = 'arf';        # 'attach', 'plain', 'resend', 'arf'
 # $daemon_chroot_dir = $MYHOME;   # chroot directory or undef, -R
 # $db_home   = "$MYHOME/db";      # dir for bdb nanny/cache/snmp databases, -D
 # $helpers_home = "$MYHOME/var";  # working directory for SpamAssassin, -S
 $lock_file = "/run/amavis/lock";  # -L
 $pid_file = "/run/amavis/pid";   # -P
 #NOTE: create directories $MYHOME/tmp, $MYHOME/var, $MYHOME/db manually
 $log_level = 0;              # verbosity 0..5, -d
 $log_recip_templ = undef;    # disable by-recipient level-0 log entries
 $do_syslog = 1;              # log via syslogd (preferred)
 $syslog_facility = 'mail';   # Syslog facility as a string
           # e.g.: mail, daemon, user, local0, ... local7
 $enable_db = 1;              # enable use of BerkeleyDB/libdb (SNMP and nanny)
 # $enable_zmq = 1;           # enable use of ZeroMQ (SNMP and nanny)
 $nanny_details_level = 2;    # nanny verbosity: 1: traditional, 2: detailed
 $enable_dkim_verification = 1;  # enable DKIM signatures verification
 $enable_dkim_signing = 1;    # load DKIM signing code, keys defined by dkim_key
@local_domains_maps = ( [".$mydomain"] );  # list of all local domains
@mynetworks = qw( 127.0.0.0/8 [::1] [FE80::]/10 [FEC0::]/10
                  10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 );
 $unix_socketname = "/run/amavis/sock";  # amavisd-release or amavis-milter
               # option(s) -p overrides $inet_socket_port and $unix_socketname
 $inet_socket_port = 10024;   # listen on this local TCP port(s)
 # $inet_socket_port = [10024,10026];  # listen on multiple TCP ports
 $policy_bank{'MYNETS'} = {   # mail originating from @mynetworks
  originating => 1,  # is true in MYNETS by default, but let's make it explicit
  os_fingerprint_method => undef,  # don't query p0f for internal clients
 };
 # it is up to MTA to re-route mail from authenticated roaming users or
 # from internal hosts to a dedicated TCP port (such as 10026) for filtering
 $interface_policy{'10026'} = 'ORIGINATING';
 $policy_bank{'ORIGINATING'} = {  # mail supposedly originating from our users
  originating => 1,  # declare that mail was submitted by our smtp client
  allow_disclaimers => 1,  # enables disclaimer insertion if available
  # notify administrator of locally originating malware
  virus_admin_maps => ["virusalert\@$mydomain"],
  spam_admin_maps  => ["virusalert\@$mydomain"],
  warnbadhsender   => 1,
  # forward to a smtpd service providing DKIM signing service
  forward_method => 'smtp:[127.0.0.1]:10027',
  # force MTA conversion to 7-bit (e.g. before DKIM signing)
  smtpd_discard_ehlo_keywords => ['8BITMIME'],
  bypass_banned_checks_maps => [1],  # allow sending any file names and types
  terminate_dsn_on_notify_success => 0,  # don't remove NOTIFY=SUCCESS option
 };
 $interface_policy{'SOCK'} = 'AM.PDP-SOCK'; # only applies with $unix_socketname
 # Use with amavis-release over a socket or with Petr Rehor's amavis-milter.c
 # (with amavis-milter.c from this package or old amavis.c client use 'AM.CL'):
 $policy_bank{'AM.PDP-SOCK'} = {
  protocol => 'AM.PDP',
  auth_required_release => 0,  # do not require secret_id for amavisd-release
 };
 $sa_tag_level_deflt  = -10.0;  # add spam info headers if at, or above that level
 $sa_tag2_level_deflt = 6.31;  # add 'spam detected' headers at that level
 $sa_kill_level_deflt = 6.31;  # triggers spam evasive actions (e.g. blocks mail)
 $sa_dsn_cutoff_level = 10;   # spam level beyond which a DSN is suppressed
 $sa_crediblefrom_dsn_cutoff_level = 18; # likewise, but for a likely valid From
 # $sa_quarantine_cutoff_level = 25; # spam level beyond which quarantine is off
 $penpals_bonus_score = 8;    # (no effect without a @storage_sql_dsn database)
 $penpals_threshold_high = $sa_kill_level_deflt;  # don't waste time on hi spam
 $bounce_killer_score = 100;  # spam score points to add for joe-jobbed bounces
 $sa_mail_body_size_limit = 400*1024; # don't waste time on SA if mail is larger
 $sa_local_tests_only = 0;    # only tests which do not require internet access?
 # @lookup_sql_dsn =
 #   ( ['DBI:mysql:database=mail;host=127.0.0.1;port=3306', 'user1', 'passwd1'],
 #     ['DBI:mysql:database=mail;host=host2', 'username2', 'password2'],
 #     ["DBI:SQLite:dbname=$MYHOME/sql/mail_prefs.sqlite", '', ''] );
 # @storage_sql_dsn = @lookup_sql_dsn;  # none, same, or separate database
 # @storage_redis_dsn = ( {server=>'127.0.0.1:6379', db_id=>1} );
 # $redis_logging_key = 'amavis-log';
 # $redis_logging_queue_size_limit = 300000;  # about 250 MB / 100000
 # $timestamp_fmt_mysql = 1; # if using MySQL *and* msgs.time_iso is TIMESTAMP;
 #   defaults to 0, which is good for non-MySQL or if msgs.time_iso is CHAR(16)
 $virus_admin               = "virusalert\@$mydomain";  # notifications recip.
 $mailfrom_notify_admin     = "virusalert\@$mydomain";  # notifications sender
 $mailfrom_notify_recip     = "virusalert\@$mydomain";  # notifications sender
 $mailfrom_notify_spamadmin = "spam.police\@$mydomain"; # notifications sender
 $mailfrom_to_quarantine = ''; # null return path; uses original sender if undef
@addr_extension_virus_maps      = ('virus');
@addr_extension_banned_maps     = ('banned');
@addr_extension_spam_maps       = ('spam');
@addr_extension_bad_header_maps = ('badh');
 # $recipient_delimiter = '+';  # undef disables address extensions altogether
 # when enabling addr extensions do also Postfix/main.cf: recipient_delimiter=+
 $path = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/usr/bin:/bin';
 # $dspam = 'dspam';
 $MAXLEVELS = 14;
 $MAXFILES = 3000;
 $MIN_EXPANSION_QUOTA =      100*1024;  # bytes  (default undef, not enforced)
 $MAX_EXPANSION_QUOTA = 500*1024*1024;  # bytes  (default undef, not enforced)
 $sa_spam_subject_tag = '***Spam*** ';
 $defang_virus  = 1;  # MIME-wrap passed infected mail
 $defang_banned = 1;  # MIME-wrap passed mail containing banned name
 # for defanging bad headers only turn on certain minor contents categories:
 $defang_by_ccat{CC_BADH.",3"} = 1;  # NUL or CR character in header
 $defang_by_ccat{CC_BADH.",5"} = 1;  # header line longer than 998 characters
 $defang_by_ccat{CC_BADH.",6"} = 1;  # header field syntax error
 # OTHER MORE COMMON SETTINGS (defaults may suffice):
 # $myhostname = 'host.example.com';  # must be a fully-qualified domain name!
 # $notify_method  = 'smtp:[127.0.0.1]:10025';
 # $forward_method = 'smtp:[127.0.0.1]:10025';  # set to undef with milter!
 # $final_virus_destiny      = D_DISCARD;
 # $final_banned_destiny     = D_DISCARD;
 # $final_spam_destiny       = D_PASS;  #!!!  D_DISCARD / D_REJECT
 # $final_bad_header_destiny = D_PASS;
 # $bad_header_quarantine_method = undef;
 # $os_fingerprint_method = 'p0f:*:2345';  # to query p0f-analyzer.pl
 ## hierarchy by which a final setting is chosen:
 ##   policy bank (based on port or IP address) -> *_by_ccat
 ##   *_by_ccat (based on mail contents) -> *_maps
 ##   *_maps (based on recipient address) -> final configuration value
 # SOME OTHER VARIABLES WORTH CONSIDERING (see amavisd.conf-default for all)
 # $warnbadhsender,
 # $warnvirusrecip, $warnbannedrecip, $warnbadhrecip, (or @warn*recip_maps)
 #
 # @bypass_virus_checks_maps, @bypass_spam_checks_maps,
 # @bypass_banned_checks_maps, @bypass_header_checks_maps,
 #
 # @virus_lovers_maps, @spam_lovers_maps,
 # @banned_files_lovers_maps, @bad_header_lovers_maps,
 #
 # @blacklist_sender_maps, @score_sender_maps,
 #
 # $clean_quarantine_method, $virus_quarantine_to, $banned_quarantine_to,
 # $bad_header_quarantine_to, $spam_quarantine_to,
 #
 # $defang_bad_header, $defang_undecipherable, $defang_spam
 # REMAINING IMPORTANT VARIABLES ARE LISTED HERE BECAUSE OF LONGER ASSIGNMENTS
@keep_decoded_original_maps = (new_RE(
  qr'^MAIL$',                # let virus scanner see full original message
  qr'^MAIL-UNDECIPHERABLE$', # same as ^MAIL$ if mail is undecipherable
  qr'^(ASCII(?! cpio)|text|uuencoded|xxencoded|binhex)'i,
 # qr'^Zip archive data',     # don't trust Archive::Zip
 ));
 $banned_filename_re = new_RE(
 ### BLOCKED ANYWHERE
 # qr'^UNDECIPHERABLE$',  # is or contains any undecipherable components
  qr'^\.(exe-ms|dll)$',                   # banned file(1) types, rudimentary
 # qr'^\.(exe|lha|cab|dll)$',              # banned file(1) types
 ### BLOCK THE FOLLOWING, EXCEPT WITHIN UNIX ARCHIVES:
 # [ qr'^\.(gz|bz2)$'             => 0 ],  # allow any in gzip or bzip2
  [ qr'^\.(rpm|cpio|tar)$'       => 0 ],  # allow any in Unix-type archives
  qr'.\.(pif|scr)$'i,                     # banned extensions - rudimentary
 # qr'^\.zip$',                            # block zip type
 ### BLOCK THE FOLLOWING, EXCEPT WITHIN ARCHIVES:
 # [ qr'^\.(zip|rar|arc|arj|zoo)$'=> 0 ],  # allow any within these archives
  qr'^application/x-msdownload$'i,        # block these MIME types
  qr'^application/x-msdos-program$'i,
  qr'^application/hta$'i,
 # qr'^message/partial$'i,         # rfc2046 MIME type
 # qr'^message/external-body$'i,   # rfc2046 MIME type
 # qr'^(application/x-msmetafile|image/x-wmf)$'i,  # Windows Metafile MIME type
 # qr'^\.wmf$',                            # Windows Metafile file(1) type
  # block certain double extensions in filenames
  qr'^(?!cid:).*\.[^./]*[A-Za-z][^./]*\.\s*(exe|vbs|pif|scr|bat|cmd|com|cpl|dll)[.\s]*$'i,
 # qr'\{[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}\}?'i, # Class ID CLSID, strict
 # qr'\{[0-9a-z]{4,}(-[0-9a-z]{4,}){0,7}\}?'i, # Class ID extension CLSID, loose
  qr'.\.(exe|vbs|pif|scr|cpl)$'i,             # banned extension - basic
 # qr'.\.(exe|vbs|pif|scr|cpl|bat|cmd|com)$'i, # banned extension - basic+cmd
 # qr'.\.(ade|adp|app|bas|bat|chm|cmd|com|cpl|crt|emf|exe|fxp|grp|hlp|hta|
 #        inf|ini|ins|isp|js|jse|lib|lnk|mda|mdb|mde|mdt|mdw|mdz|msc|msi|
 #        msp|mst|ocx|ops|pcd|pif|prg|reg|scr|sct|shb|shs|sys|vb|vbe|vbs|vxd|
 #        wmf|wsc|wsf|wsh)$'ix,                # banned extensions - long
 # qr'.\.(asd|asf|asx|url|vcs|wmd|wmz)$'i,     # consider also
 # qr'.\.(ani|cur|ico)$'i,                 # banned cursors and icons filename
 # qr'^\.ani$',                            # banned animated cursor file(1) type
 # qr'.\.(mim|b64|bhx|hqx|xxe|uu|uue)$'i,  # banned extension - WinZip vulnerab.
 );
 # 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"),
   { # 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
 });
@decoders = (
  ['mail', \&do_mime_decode],
 # [[qw(asc uue hqx ync)], \&do_ascii],  # not safe
  ['F',    \&do_uncompress, ['unfreeze', 'freeze -d', 'melt', 'fcat'] ],
  ['Z',    \&do_uncompress, ['uncompress', 'gzip -d', 'zcat'] ],
  ['gz',   \&do_uncompress, 'gzip -d'],
  ['gz',   \&do_gunzip],
  ['bz2',  \&do_uncompress, 'bzip2 -d'],
  ['xz',   \&do_uncompress,
           ['xzdec', 'xz -dc', 'unxz -c', 'xzcat'] ],
  ['lzma', \&do_uncompress,
           ['lzmadec', 'xz -dc --format=lzma',
            'lzma -dc', 'unlzma -c', 'lzcat', 'lzmadec'] ],
  ['lrz',  \&do_uncompress,
           ['lrzip -q -k -d -o -', 'lrzcat -q -k'] ],
  ['lzo',  \&do_uncompress, 'lzop -d'],
  ['lz4',  \&do_uncompress, ['lz4c -d'] ],
  ['rpm',  \&do_uncompress, ['rpm2cpio.pl', 'rpm2cpio'] ],
  [['cpio','tar'], \&do_pax_cpio, ['pax', 'gcpio', 'cpio'] ],
           # ['/usr/local/heirloom/usr/5bin/pax', 'pax', 'gcpio', 'cpio']
  ['deb',  \&do_ar, 'ar'],
 # ['a',    \&do_ar, 'ar'],  # unpacking .a seems an overkill
  ['rar',  \&do_unrar, ['unrar', 'rar'] ],
  ['arj',  \&do_unarj, ['unarj', 'arj'] ],
  ['arc',  \&do_arc,   ['nomarch', 'arc'] ],
  ['zoo',  \&do_zoo,   ['zoo', 'unzoo'] ],
  ['doc',  \&do_ole,   'ripole'],
  ['cab',  \&do_cabextract, 'cabextract'],
  ['tnef', \&do_tnef_ext, 'tnef'],
  ['tnef', \&do_tnef],
 # ['lha',  \&do_lha,   'lha'],  # not safe, use 7z instead
 # ['sit',  \&do_unstuff, 'unstuff'],  # not safe
  [['zip','kmz'], \&do_7zip,  ['7za', '7z'] ],
  [['zip','kmz'], \&do_unzip],
  ['7z',   \&do_7zip,  ['7zr', '7za', '7z'] ],
  [[qw(gz bz2 Z tar)],
           \&do_7zip,  ['7za', '7z'] ],
  [[qw(xz lzma jar cpio arj rar swf lha iso cab deb rpm)],
           \&do_7zip,  '7z' ],
  ['exe',  \&do_executable, ['unrar','rar'], 'lha', ['unarj','arj'] ],
 );
@av_scanners = (
 # ### http://www.sophos.com/
 # ['Sophos-SSSP',  # SAV Dynamic Interface
 #   \&ask_daemon, ["{}", 'sssp:/var/run/savdi/sssp.sock'],
 #           # or: ["{}", 'sssp:[127.0.0.1]:4010'],
 #   qr/^DONE OK\b/m, qr/^VIRUS\b/m, qr/^VIRUS\s*(\S*)/m ],
 # ### http://www.clanfield.info/sophie/ (http://www.vanja.com/tools/sophie/)
 # ['Sophie',
 #   \&ask_daemon, ["{}/\n", 'sophie:/var/run/sophie'],
 #   qr/(?x)^ 0+ ( : | [\000\r\n]* $)/,  qr/(?x)^ 1 ( : | [\000\r\n]* $)/,
 #   qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
 # ### http://www.csupomona.edu/~henson/www/projects/SAVI-Perl/
 # ['Sophos SAVI', \&ask_daemon, ['{}','savi-perl:'] ],
 # ['Avira SAVAPI',
 #   \&ask_daemon, ["*", 'savapi:/var/tmp/.savapi3', 'product-id'],
 #   qr/^(200|210)/m,  qr/^(310|420|319)/m,
 #   qr/^(?:310|420)[,\s]*(?:.* <<< )?(.+?)(?: ; |$)/m ],
 # settings for the SAVAPI3.conf: ArchiveScan=1, HeurLevel=2, MailboxScan=1
 # ### http://www.clamav.net/
 # ['ClamAV-clamd',
 #   \&ask_daemon, ["CONTSCAN {}\n", "/var/run/clamav/clamd.sock"],
 #   qr/\bOK$/m, qr/\bFOUND$/m,
 #   qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
 # # NOTE: run clamd under the same user as amavisd - or run it under its own
 # #   uid such as clamav, add user clamav to the amavis group, and then add
 # #   AllowSupplementaryGroups to clamd.conf;
 # # NOTE: match socket name (LocalSocket) in clamav.conf to the socket name in
 # #   this entry; when running chrooted one may prefer a socket under $MYHOME.
 # ### http://www.clamav.net/ and CPAN  (memory-hungry! clamd is preferred)
 # # note that Mail::ClamAV requires perl to be build with threading!
 # ['Mail::ClamAV', \&ask_daemon, ['{}','clamav-perl:'],
 #   [0], [1], qr/^INFECTED: (.+)/m],
 # ### http://www.openantivirus.org/
 # ['OpenAntiVirus ScannerDaemon (OAV)',
 #   \&ask_daemon, ["SCAN {}\n", '127.0.0.1:8127'],
 #   qr/^OK/m, qr/^FOUND: /m, qr/^FOUND: (.+)/m ],
 # ### http://www.vanja.com/tools/trophie/
 # ['Trophie',
 #   \&ask_daemon, ["{}/\n", 'trophie:/var/run/trophie'],
 #   qr/(?x)^ 0+ ( : | [\000\r\n]* $)/m,  qr/(?x)^ 1 ( : | [\000\r\n]* $)/m,
 #   qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
 # ### http://www.grisoft.com/
 # ['AVG Anti-Virus',
 #   \&ask_daemon, ["SCAN {}\n", '127.0.0.1:55555'],
 #   qr/^200/m, qr/^403/m, qr/^403[- ].*: ([^\r\n]+)/m ],
 # ### http://www.f-prot.com/
 # ['F-Prot fpscand',  # F-PROT Antivirus for BSD/Linux/Solaris, version 6
 #   \&ask_daemon,
 #   ["SCAN FILE {}/*\n", '127.0.0.1:10200'],
 #   qr/^(0|8|64) /m,
 #   qr/^([1235679]|1[01345]) |<[^>:]*(?i)(infected|suspicious|unwanted)/m,
 #   qr/(?i)<[^>:]*(?:infected|suspicious|unwanted)[^>:]*: ([^>]*)>/m ],
 # ### http://www.f-prot.com/
 # ['F-Prot f-protd',  # old version
 #   \&ask_daemon,
 #   ["GET {}/*?-dumb%20-archive%20-packed HTTP/1.0\r\n\r\n",
 #     ['127.0.0.1:10200', '127.0.0.1:10201', '127.0.0.1:10202',
 #      '127.0.0.1:10203', '127.0.0.1:10204'] ],
 #   qr/(?i)<summary[^>]*>clean<\/summary>/m,
 #   qr/(?i)<summary[^>]*>infected<\/summary>/m,
 #   qr/(?i)<name>(.+)<\/name>/m ],
 # ### http://www.sald.com/, http://www.dials.ru/english/, http://www.drweb.ru/
 # ['DrWebD', \&ask_daemon,   # DrWebD 4.31 or later
 #   [pack('N',1).  # DRWEBD_SCAN_CMD
 #    pack('N',0x00280001).   # DONT_CHANGEMAIL, IS_MAIL, RETURN_VIRUSES
 #    pack('N',     # path length
 #      length("$TEMPBASE/amavis-yyyymmddTHHMMSS-xxxxx/parts/pxxx")).
 #    '{}/*'.       # path
 #    pack('N',0).  # content size
 #    pack('N',0),
 #    '/var/drweb/run/drwebd.sock',
 #  # '/var/amavis/var/run/drwebd.sock',   # suitable for chroot
 #  # '/usr/local/drweb/run/drwebd.sock',  # FreeBSD drweb ports default
 #  # '127.0.0.1:3000',                    # or over an inet socket
 #   ],
 #   qr/\A\x00[\x10\x11][\x00\x10]\x00/sm,        # IS_CLEAN,EVAL_KEY; SKIPPED
 #   qr/\A\x00[\x00\x01][\x00\x10][\x20\x40\x80]/sm,# KNOWN_V,UNKNOWN_V,V._MODIF
 #   qr/\A.{12}(?:infected with )?([^\x00]+)\x00/sm,
 # ],
 # # NOTE: If using amavis-milter, change length to:
 # # length("$TEMPBASE/amavis-milter-xxxxxxxxxxxxxx/parts/pxxx").
  ### http://www.kaspersky.com/  (kav4mailservers)
  ['KasperskyLab AVP - aveclient',
    ['/usr/local/kav/bin/aveclient','/usr/local/share/kav/bin/aveclient',
     '/opt/kav/5.5/kav4mailservers/bin/aveclient','aveclient'],
    '-p /var/run/aveserver -s {}/*',
    [0,3,6,8], qr/\b(INFECTED|SUSPICION|SUSPICIOUS)\b/m,
    qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.+)/m,
  ],
  # NOTE: one may prefer [0],[2,3,4,5], depending on how suspicious,
  # currupted or protected archives are to be handled
  ### http://www.kaspersky.com/
  ['KasperskyLab AntiViral Toolkit Pro (AVP)', ['avp'],
    '-* -P -B -Y -O- {}', [0,3,6,8], [2,4],    # any use for -A -K   ?
    qr/infected: (.+)/m,
    sub {chdir('/opt/AVP') or die "Can't chdir to AVP: $!"},
    sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
  ],
  ### The kavdaemon and AVPDaemonClient have been removed from Kasperky
  ### products and replaced by aveserver and aveclient
  ['KasperskyLab AVPDaemonClient',
    [ '/opt/AVP/kavdaemon',       'kavdaemon',
      '/opt/AVP/AvpDaemonClient', 'AvpDaemonClient',
      '/opt/AVP/AvpTeamDream',    'AvpTeamDream',
      '/opt/AVP/avpdc', 'avpdc' ],
    "-f=$TEMPBASE {}", [0,8], [3,4,5,6], qr/infected: ([^\r\n]+)/m ],
    # change the startup-script in /etc/init.d/kavd to:
    #   DPARMS="-* -Y -dl -f=/var/amavis /var/amavis"
    #   (or perhaps:   DPARMS="-I0 -Y -* /var/amavis" )
    # adjusting /var/amavis above to match your $TEMPBASE.
    # The '-f=/var/amavis' is needed if not running it as root, so it
    # can find, read, and write its pid file, etc., see 'man kavdaemon'.
    # defUnix.prf: there must be an entry "*/var/amavis" (or whatever
    #   directory $TEMPBASE specifies) in the 'Names=' section.
    # cd /opt/AVP/DaemonClients; configure; cd Sample; make
    # cp AvpDaemonClient /opt/AVP/
    # su - vscan -c "${PREFIX}/kavdaemon ${DPARMS}"
  ### http://www.centralcommand.com/
  ['CentralCommand Vexira (new) vascan',
    ['vascan','/usr/lib/Vexira/vascan'],
    "-a s --timeout=60 --temp=$TEMPBASE -y $QUARANTINEDIR ".
    "--log=/var/log/vascan.log {}",
    [0,3], [1,2,5],
    qr/(?x)^\s* (?:virus|iworm|macro|mutant|sequence|trojan)\ found:\ ( [^\]\s']+ )\ \.\.\.\ /m ],
    # Adjust the path of the binary and the virus database as needed.
    # 'vascan' does not allow to have the temp directory to be the same as
    # the quarantine directory, and the quarantine option can not be disabled.
    # If $QUARANTINEDIR is not used, then another directory must be specified
    # to appease 'vascan'. Move status 3 to the second list if password
    # protected files are to be considered infected.
  ### http://www.avira.com/
  ### old Avira AntiVir 2.x (ex H+BEDV) or old CentralCommand Vexira Antivirus
  ['Avira AntiVir', ['antivir','vexira'],
    '--allfiles -noboot -nombr -rs -s -z {}', [0], qr/ALERT:|VIRUS:/m,
    qr/(?x)^\s* (?: ALERT: \s* (?: \[ | [^']* ' ) |
         (?i) VIRUS:\ .*?\ virus\ '?) ( [^\]\s']+ )/m ],
    # NOTE: if you only have a demo version, remove -z and add 214, as in:
    #  '--allfiles -noboot -nombr -rs -s {}', [0,214], qr/ALERT:|VIRUS:/,
  ### http://www.avira.com/
  ### Avira for UNIX 3.x
  ['Avira AntiVir', ['avscan'],
   '-s --batch --alert-action=none {}', [0,4], qr/(?:ALERT|FUND):/m,
   qr/(?:ALERT|FUND): (?:.* <<< )?(.+?)(?: ; |$)/m ],
  ### http://www.commandsoftware.com/
  ['Command AntiVirus for Linux', 'csav',
    '-all -archive -packed {}', [50], [51,52,53],
    qr/Infection: (.+)/m ],
  ### http://www.symantec.com/
  ['Symantec CarrierScan via Symantec CommandLineScanner',
    'cscmdline', '-a scan -i 1 -v -s 127.0.0.1:7777 {}',
    qr/^Files Infected:\s+0$/m, qr/^Infected\b/m,
    qr/^(?:Info|Virus Name):\s+(.+)/m ],
  ### http://www.symantec.com/
  ['Symantec AntiVirus Scan Engine',
    'savsecls', '-server 127.0.0.1:7777 -mode scanrepair -details -verbose {}',
    [0], qr/^Infected\b/m,
    qr/^(?:Info|Virus Name):\s+(.+)/m ],
    # NOTE: check options and patterns to see which entry better applies
 # ### http://www.f-secure.com/products/anti-virus/  version 5.52
 #  ['F-Secure Antivirus for Linux servers',
 #   ['/opt/f-secure/fsav/bin/fsav', 'fsav'],
 #   '--virus-action1=report --archive=yes --auto=yes '.
 #   '--dumb=yes --list=no --mime=yes {}', [0], [3,4,6,8],
 #   qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
 #   # NOTE: internal archive handling may be switched off by '--archive=no'
 #   #   to prevent fsav from exiting with status 9 on broken archives
  ### http://www.f-secure.com/ version 9.14
   ['F-Secure Linux Security',
    ['/opt/f-secure/fsav/bin/fsav', 'fsav'],
    '--virus-action1=report --archive=yes --auto=yes '.
    '--list=no --nomimeerr {}', [0], [3,4,6,8],
    qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
    # NOTE: internal archive handling may be switched off by '--archive=no'
    #   to prevent fsav from exiting with status 9 on broken archives
 # ### http://www.avast.com/
 # ['avast! Antivirus daemon',
 #   \&ask_daemon,  # greets with 220, terminate with QUIT
 #   ["SCAN {}\015\012QUIT\015\012", '/var/run/avast4/mailscanner.sock'],
 #   qr/\t\[\+\]/m, qr/\t\[L\]\t/m, qr/\t\[L\]\t[0-9]+\s+([^[ \t\015\012]+)/m ],
 # ### http://www.avast.com/
 # ['avast! Antivirus - Client/Server Version', 'avastlite',
 #   '-a /var/run/avast4/mailscanner.sock -n {}', [0], [1],
 #   qr/\t\[L\]\t([^[ \t\015\012]+)/m ],
  ['CAI InoculateIT', 'inocucmd',  # retired product
    '-sec -nex {}', [0], [100],
    qr/was infected by virus (.+)/m ],
  # see: http://www.flatmtn.com/computer/Linux-Antivirus_CAI.html
  ### http://www3.ca.com/Solutions/Product.asp?ID=156  (ex InoculateIT)
  ['CAI eTrust Antivirus', 'etrust-wrapper',
    '-arc -nex -spm h {}', [0], [101],
    qr/is infected by virus: (.+)/m ],
    # NOTE: requires suid wrapper around inocmd32; consider flag: -mod reviewer
    # see http://marc.theaimsgroup.com/?l=amavis-user&m=109229779912783
  ### http://mks.com.pl/english.html
  ['MkS_Vir for Linux (beta)', ['mks32','mks'],
    '-s {}/*', [0], [1,2],
    qr/--[ \t]*(.+)/m ],
  ### http://mks.com.pl/english.html
  ['MkS_Vir daemon', 'mksscan',
    '-s -q {}', [0], [1..7],
    qr/^... (\S+)/m ],
 # ### http://www.nod32.com/,  version v2.52 (old)
 # ['ESET NOD32 for Linux Mail servers',
 #   ['/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
 #    '--subdir --files -z --sfx --rtp --adware --unsafe --pattern --heur '.
 #    '-w -a --action-on-infected=accept --action-on-uncleanable=accept '.
 #    '--action-on-notscanned=accept {}',
 #   [0,3], [1,2], qr/virus="([^"]+)"/m ],
 # ### http://www.eset.com/, version v2.7 (old)
 # ['ESET NOD32 Linux Mail Server - command line interface',
 #   ['/usr/bin/nod32cli', '/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
 #   '--subdir {}', [0,3], [1,2], qr/virus="([^"]+)"/m ],
 # ### http://www.eset.com/, version 2.71.12
 # ['ESET Software ESETS Command Line Interface',
 #   ['/usr/bin/esets_cli', 'esets_cli'],
 #   '--subdir {}', [0], [1,2,3], qr/virus="([^"]+)"/m ],
  ### http://www.eset.com/, version 3.0
  ['ESET Software ESETS Command Line Interface',
    ['/usr/bin/esets_cli', 'esets_cli'],
    '--subdir {}', [0], [1,2,3],
    qr/:\s*action="(?!accepted)[^"]*"\n.*:\s*virus="([^"]*)"/m ],
  ## http://www.nod32.com/,  NOD32LFS version 2.5 and above
  ['ESET NOD32 for Linux File servers',
    ['/opt/eset/nod32/sbin/nod32','nod32'],
    '--files -z --mail --sfx --rtp --adware --unsafe --pattern --heur '.
    '-w -a --action=1 -b {}',
    [0], [1,10], qr/^object=.*, virus="(.*?)",/m ],
 # Experimental, based on posting from Rado Dibarbora (Dibo) on 2002-05-31
 # ['ESET Software NOD32 Client/Server (NOD32SS)',
 #   \&ask_daemon2,    # greets with 200, persistent, terminate with QUIT
 #   ["SCAN {}/*\r\n", '127.0.0.1:8448' ],
 #   qr/^200 File OK/m, qr/^201 /m, qr/^201 (.+)/m ],
  ### http://www.norman.com/products_nvc.shtml
  ['Norman Virus Control v5 / Linux', 'nvcc',
    '-c -l:0 -s -u -temp:$TEMPBASE {}', [0,10,11], [1,2,14],
    qr/(?i).* virus in .* -> \'(.+)\'/m ],
  ### http://www.pandasoftware.com/
  ['Panda CommandLineSecure 9 for Linux',
    ['/opt/pavcl/usr/bin/pavcl','pavcl'],
    '-auto -aex -heu -cmp -nbr -nor -nos -eng -nob {}',
    qr/Number of files infected[ .]*: 0+(?!\d)/m,
    qr/Number of files infected[ .]*: 0*[1-9]/m,
    qr/Found virus :\s*(\S+)/m ],
  # NOTE: for efficiency, start the Panda in resident mode with 'pavcl -tsr'
  # before starting amavisd - the bases are then loaded only once at startup.
  # To reload bases in a signature update script:
  #   /opt/pavcl/usr/bin/pavcl -tsr -ulr; /opt/pavcl/usr/bin/pavcl -tsr
  # Please review other options of pavcl, for example:
  #  -nomalw, -nojoke, -nodial, -nohackt, -nospyw, -nocookies
 # ### http://www.pandasoftware.com/
 # ['Panda Antivirus for Linux', ['pavcl'],
 #   '-TSR -aut -aex -heu -cmp -nbr -nor -nso -eng {}',
 #   [0], [0x10, 0x30, 0x50, 0x70, 0x90, 0xB0, 0xD0, 0xF0],
 #   qr/Found virus :\s*(\S+)/m ],
 # GeCAD AV technology is acquired by Microsoft; RAV has been discontinued.
 # Check your RAV license terms before fiddling with the following two lines!
 # ['GeCAD RAV AntiVirus 8', 'ravav',
 #   '--all --archive --mail {}', [1], [2,3,4,5], qr/Infected: (.+)/m ],
 # # NOTE: the command line switches changed with scan engine 8.5 !
 # # (btw, assigning stdin to /dev/null causes RAV to fail)
  ### http://www.nai.com/
  ['NAI McAfee AntiVirus (uvscan)', 'uvscan',
    '--secure -rv --mime --summary --noboot - {}', [0], [13],
    qr/(?x) Found (?:
        \ the\ (.+)\ (?:virus|trojan)  |
        \ (?:virus|trojan)\ or\ variant\ ([^ ]+)  |
        :\ (.+)\ NOT\ a\ virus)/m,
  # sub {$ENV{LD_PRELOAD}='/lib/libc.so.6'},
  # sub {delete $ENV{LD_PRELOAD}},
  ],
  # NOTE1: with RH9: force the dynamic linker to look at /lib/libc.so.6 before
  # anything else by setting environment variable LD_PRELOAD=/lib/libc.so.6
  # and then clear it when finished to avoid confusing anything else.
  # NOTE2: to treat encrypted files as viruses replace the [13] with:
  #  qr/^\s{5,}(Found|is password-protected|.*(virus|trojan))/
  ### http://www.virusbuster.hu/en/
  ['VirusBuster', ['vbuster', 'vbengcl'],
    "{} -ss -i '*' -log=$MYHOME/vbuster.log", [0], [1],
    qr/: '(.*)' - Virus/m ],
  # VirusBuster Ltd. does not support the daemon version for the workstation
  # engine (vbuster-eng-1.12-linux-i386-libc6.tgz) any longer. The names of
  # binaries, some parameters AND return codes have changed (from 3 to 1).
  # See also the new Vexira entry 'vascan' which is possibly related.
 # ### http://www.virusbuster.hu/en/
 # ['VirusBuster (Client + Daemon)', 'vbengd',
 #   '-f -log scandir {}', [0], [3],
 #   qr/Virus found = (.*);/m ],
 # # HINT: for an infected file it always returns 3,
 # # although the man-page tells a different story
  ### http://www.cyber.com/
  ['CyberSoft VFind', 'vfind',
    '--vexit {}/*', [0], [23], qr/##==>>>> VIRUS ID: CVDL (.+)/m,
  # sub {$ENV{VSTK_HOME}='/usr/lib/vstk'},
  ],
 # ### http://www.avast.com/  (old)
 # ['avast! Antivirus', ['/usr/bin/avastcmd','avastcmd'],
 #   '-a -i -n -t=A {}', [0], [1], qr/\binfected by:\s+([^ \t\n\[\]]+)/m ],
  ### http://www.avast.com/
  ['avast! Antivirus', '/bin/scan', '{}', [0], [1], qr/\t(.+)/m ],
  ### http://www.ikarus-software.com/
  ['Ikarus AntiVirus for Linux', 'ikarus',
    '{}', [0], [40], qr/Signature (.+) found/m ],
  ### http://www.bitdefender.com/
  ['BitDefender', 'bdscan',  # new version
    '--action=ignore --no-list {}', qr/^Infected files\s*:\s*0+(?!\d)/m,
    qr/^(?:Infected files|Identified viruses|Suspect files)\s*:\s*0*[1-9]/m,
    qr/(?:suspected|infected)\s*:\s*(.*)(?:\033|$)/m ],
  ### http://www.bitdefender.com/
  ['BitDefender', 'bdc',  # old version
    '--arc --mail {}', qr/^Infected files *:0+(?!\d)/m,
    qr/^(?:Infected files|Identified viruses|Suspect files) *:0*[1-9]/m,
    qr/(?:suspected|infected): (.*)(?:\033|$)/m ],
  # consider also: --all --nowarn --alev=15 --flev=15.  The --all argument may
  # not apply to your version of bdc, check documentation and see 'bdc --help'
  ### ArcaVir for Linux and Unix http://www.arcabit.pl/
  ['ArcaVir for Linux', ['arcacmd','arcacmd.static'],
    '-v 1 -summary 0 -s {}', [0], [1,2],
    qr/(?:VIR|WIR):[ \t]*(.+)/m ],
 # ### a generic SMTP-client interface to a SMTP-based virus scanner
 # ['av_smtp', \&ask_av_smtp,
 #   ['{}', 'smtp:[127.0.0.1]:5525', 'dummy@localhost'],
 #   qr/^2/, qr/^5/, qr/^\s*(.*?)\s*$/m ],
 # ['File::Scan', sub {Amavis::AV::ask_av(sub{
 #   use File::Scan; my($fn)=@_;
 #   my($f)=File::Scan->new(max_txt_size=>0, max_bin_size=>0);
 #   my($vname) = $f->scan($fn);
 #   $f->error ? (2,"Error: ".$f->error)
 #   : ($vname ne '') ? (1,"$vname FOUND") : (0,"Clean")}, @_) },
 #   ["{}/*"], [0], [1], qr/^(.*) FOUND$/m ],
 # ### fully-fledged checker for JPEG marker segments of invalid length
 # ['check-jpeg',
 #   sub { use JpegTester (); Amavis::AV::ask_av(\&JpegTester::test_jpeg, @_) },
 #   ["{}/*"], undef, [1], qr/^(bad jpeg: .*)$/m ],
 # # NOTE: place file JpegTester.pm somewhere where Perl can find it,
 # #       for example in /usr/local/lib/perl5/site_perl
 );
@av_scanners_backup = (
  ### http://www.clamav.net/   - backs up clamd or Mail::ClamAV
  ['ClamAV-clamscan', 'clamscan',
    "--stdout --no-summary -r --tempdir=$TEMPBASE {}",
    [0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
 # ### http://www.clamav.net/ - using remote clamd scanner as a backup
 # ['ClamAV-clamdscan', 'clamdscan',
 #   "--stdout --no-summary --config-file=/etc/clamd-client.conf {}",
 #   [0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
 # ['ClamAV-clamd-stream',
 #   \&ask_daemon, ["*", 'clamd:/var/run/clamav/clamd.sock'],
 #   qr/\bOK$/m, qr/\bFOUND$/m,
 #   qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
  ### http://www.f-prot.com/   - backs up F-Prot Daemon, V6
  ['F-PROT Antivirus for UNIX', ['fpscan'],
    '--report --mount --adware {}',  # consider: --applications -s 4 -u 3 -z 10
    [0,8,64],  [1,2,3, 4+1,4+2,4+3, 8+1,8+2,8+3, 12+1,12+2,12+3],
    qr/^\[Found\s+[^\]]*\]\s+<([^ \t(>]*)/m ],
  ### http://www.f-prot.com/   - backs up F-Prot Daemon (old)
  ['FRISK F-Prot Antivirus', ['f-prot','f-prot.sh'],
    '-dumb -archive -packed {}', [0,8], [3,6],   # or: [0], [3,6,8],
    qr/(?:Infection:|security risk named) (.+)|\s+contains\s+(.+)$/m ],
  ### http://www.trendmicro.com/   - backs up Trophie
  ['Trend Micro FileScanner', ['/etc/iscan/vscan','vscan'],
    '-za -a {}', [0], qr/Found virus/m, qr/Found virus (.+) in/m ],
  ### http://www.sald.com/, http://drweb.imshop.de/   - backs up DrWebD
  ['drweb - DrWeb Antivirus',  # security LHA hole in Dr.Web 4.33 and earlier
    ['/usr/local/drweb/drweb', '/opt/drweb/drweb', 'drweb'],
    '-path={} -al -go -ot -cn -upn -ok-',
    [0,32], [1,9,33], qr' infected (?:with|by)(?: virus)? (.*)$'m ],
   ### http://www.kaspersky.com/
   ['Kaspersky Antivirus v5.5',
     ['/opt/kaspersky/kav4fs/bin/kav4fs-kavscanner',
      '/opt/kav/5.5/kav4unix/bin/kavscanner',
      '/opt/kav/5.5/kav4mailservers/bin/kavscanner', 'kavscanner'],
     '-i0 -xn -xp -mn -R -ePASBME {}/*', [0,10,15], [5,20,21,25],
     qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.*)/m,
 #    sub {chdir('/opt/kav/bin') or die "Can't chdir to kav: $!"},
 #    sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
   ],
  ### http://www.sophos.com/
  ['Sophos Anti Virus (savscan)',   # formerly known as 'sweep'
    ['/opt/sophos-av/bin/savscan', 'savscan'],  # 'sweep'
    '-nb -f -all -rec -ss -sc -archive -cab -mime -oe -tnef '.
    '--no-reset-atime {}',
    [0,2], qr/Virus .*? found/m,
    qr/^>>> Virus(?: fragment)? '?(.*?)'? found/m,
  ],
  # other options to consider: -idedir=/usr/local/sav
  # A name 'sweep' clashes with a name of an audio editor (Debian and FreeBSD).
  # Make sure the correct 'sweep' is found in the path if using the old name.
 # Always succeeds and considers mail clean.
 # Potentially useful when all other scanners fail and it is desirable
 # to let mail continue to flow with no virus checking (when uncommented).
 # ['always-clean', sub {0}],
 );
 1;  # insure a defined return value
--- a/postfix/master.cf
+++ b/postfix/master.cf
@ -3,6 +3,7 @@
 #               (yes)   (yes)   (no)    (never) (100)
 # ==========================================================================
 smtp      inet  n       -       n       -       -       smtpd
 -o content_filter=smtp-amavisfeed:[127.0.0.1]:10024
 587       inet  n       -       n       -       -       smtpd
 pickup    unix  n       -       n       60      1       pickup
@ -28,3 +29,31 @@ virtual   unix  -       n       n       -       -       virtual
 lmtp      unix  -       -       n       -       -       lmtp
 anvil     unix  -       -       n       -       1       anvil
 scache    unix  -       -       n       -       1       scache
 #
 # anti spam & anti virus section
 #
 smtp-amavisfeed  unix  -  -  -  -  2  smtp
 -o smtp_data_done_timeout=1200
 -o smtp_send_xforward_command=yes
 -o disable_dns_lookups=yes
 -o max_use=20
 127.0.0.1:10025  inet  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,no_milters
--- a/systemd/system/amavisd.service
+++ b/systemd/system/amavisd.service
@ -0,0 +1,18 @@
 [Unit]
 Description=Amavisd Daemon
 Wants=spamassassin.service
 After=network.target
 [Service]
 PIDFile=/run/amavis/pid
 User=amavis
 Group=amavis
 RuntimeDirectory=amavis
 RuntimeDirectoryMode=750
 ExecStartPre=/usr/bin/sleep 20
 ExecStart=/usr/bin/amavisd -c /etc/amavisd/amavisd.conf foreground
 ExecReload=/usr/bin/amavisd -c /etc/amavisd/amavisd.conf reload
 PrivateTmp=true
 [Install]
 WantedBy=multi-user.target