Fixed "=caperr" rules syntax.
[PerlMail.git] / PerlMail / Config.pm
1 #! /usr/bin/perl
2
3 #       $Id$
4 # Copyright (C) 2002-2003 Jan Kratochvil <project-PerlMail@jankratochvil.net>
5
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
10
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 # GNU General Public License for more details.
15
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19
20
21 package PerlMail::Config;
22 use vars qw($VERSION);
23 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
24 use strict;
25 use warnings;
26
27 require Exporter;
28 use vars qw(@ISA @EXPORT);
29 @ISA=qw(Exporter);
30 @EXPORT=qw(
31                 $HOME
32                 $Mail @ValidUsers $IdleMax $MaxBodySMS @SMSwebRcpt $SMSwebRcpt_username
33                 $Lock_pathname $PeerAddr $Socket_timeout $DB_table $DBI_database $DBI_user $DBI_pwd
34                 $sendmail_orig @addr_addon &FromAddress @h_rcpt @h_from
35                 %audit_profile @sms_squeezes @alternates_host @dnsbl_whitelist
36
37                 $Audit $is_pgp $opt_F $procmailFROM_MAILER $store_ignore $store_ignorenewmail
38                 $store_profile
39                 );
40
41 require Mail::Alias;
42
43
44 BEGIN {
45         for (qw(headerhas store headeris did dnsbl store_muttrc_alternates Received_for parts_linear mime_type
46                         body_first mimehead razor2 header_remap)) {
47                 eval 'sub '.$_.' { return ::'.$_.'(@_); }';
48                 }
49         }
50
51
52 # perlmail-accept & perlmail-sendmail
53
54 # Various configuration files location is derived from it:
55 our $HOME="/home/lace";
56
57
58 # perlmail-accept
59
60 # Mail folder:
61 our $Mail="$HOME/Mail";
62 # Users respected for the 'idle' state (see $IdleMax):
63 our @ValidUsers=qw(root lace short kratochvil _local);
64 # Maximum number of local console idle seconds while still considered as 'active user':
65 our $IdleMax=10;
66 # Maxium number of bytes to pass to Lingua::EN::Squeeze (performance optimization):
67 our $MaxBodySMS=0x1000;
68 # Telephone number to send SMSes by WWW::SMS to:
69 our @SMSwebRcpt=qw(420 602 431329);
70 # Some WWW::SMS modules require username:
71 our $SMSwebRcpt_username="lace2";
72
73
74 # perlmail-submit
75
76 # Global system lock for exclusive $DB_table access:
77 our $Lock_pathname="/tmp/PerlMail.lock";
78 # 'workstation' hostname and port. Hostname may be dyndns:
79 our $PeerAddr="exuhome.dyn.jankratochvil.net.:852";
80 #our $PeerAddr="127.0.0.1:2852";
81 # 15sec is NOT enough as the remote peer must complete mail store:
82 our $Socket_timeout=7600;
83 # MySQL table name:
84 our $DB_table="PerlMail_folder";
85 # MySQL database name:
86 our $DBI_database="short";
87 # MySQL user name:
88 our $DBI_user="short";
89 # MySQL user password:
90 our $DBI_pwd=$ENV{"HOME"}."/priv/mysql.".$DBI_user.".pwd";
91
92
93 # perlmail-sendmail
94
95 # Lists where <rcpt-USER.AT.HOST@jankratochvil.net> address is generated:
96 my @lists=qw(
97                 tacplus-l@disaster.com
98                 gsm@sh.cvut.cz
99                 linux-fsdevel@vger.kernel.org
100                 n9k@pandora.cz
101                 dev9k@pandora.cz
102                 gsm@pandora.cz
103                 ros-general@reactos.com
104                 ros-kernel@reactos.com
105                 ros-cvs@reactos.com
106                 4cinfo@atrey.karlin.mff.cuni.cz
107                 libtool@gnu.org
108                 libtool-patches@gnu.org
109                 wine-license@winehq.com
110                 wine-devel@winehq.com
111                 wine-patches@winehq.com
112                 gtk-devel-list@gnome.org
113                 gnome-vfs-list@gnome.org
114                 captive-announce-list@jankratochvil.net
115                 captive-list@jankratochvil.net
116                 captive-devel-list@jankratochvil.net
117                 linux-ntfs-announce@lists.sourceforge.net
118                 linux-ntfs-dev@lists.sourceforge.net
119                 orbit-list@gnome.org
120                 devel@kannel.org
121                 automake@gnu.org
122                 autoconf@gnu.org
123                 wget-patches@sunsite.dk
124                 wget@sunsite.dk
125                 );
126
127 # Pathname of the original sendmail(8) binary:
128 our $sendmail_orig=(-x ($_="/usr/sbin/sendmail-orig") ? $_ : "/usr/sbin/sendmail");
129 # List of addresses to locally Bcc all mails to:
130 # Mail-Alias-1.12 defaults to "/etc/mail/aliases" which does not exist on RedHat sendmail-8.12.5-7
131 # Mail-Alias-1.12 will clutter $_ !
132 our @addr_addon=(Mail::Alias->new("/etc/aliases")->exists("sentout") ? ("sentout") : ());
133
134 our $opt_F;     # imported
135 our $is_pgp;    # imported
136 my %lists=map(($_=>1),@lists);
137 # Generate new From address for the target $rcpt of type Mail::Address.
138 # $iserror is true for "MAIL FROM" RFC821 address, false for "From:" RFC822 address.
139 # Returns: Mail::Address instance.
140 sub FromAddress
141 {
142 my($rcpt,$iserror)=@_;
143
144         my $phrase=(defined $opt_F ? $opt_F : "Jan Kratochvil");
145         {
146                 last if !$is_pgp;
147                 last if $iserror;
148                 local *F;
149                 local $_;
150                 my $filename="$HOME/.gnupg/options";
151                 open F,$filename or do { warn "Open \"$filename\": $!"; last; };
152                 local $/="\n";
153                 my @keys=map((/^\s*default-key\s+(\S+)\s*$/),<F>);
154                 @keys==1 or do { warn "Found ".scalar(@keys)." 'default-key's in your \"$filename\", ignoring"; last; };
155                 close F or warn "Close \"$filename\": $!";
156                 my $default_key=$keys[0];
157                 $default_key=~/^[[:xdigit:]]{8}$/ or do { warn "Invalid 'default-key', ignoring: $default_key"; last; };
158                 return Mail::Address->new(
159                                 $phrase,
160                                 'pgp-'.uc($default_key).'@jankratochvil.net',
161                                 );
162                 }
163         return Mail::Address->new($phrase,'lace@jankratochvil.net') if !$lists{$rcpt->address()};
164         return Mail::Address->new(
165                         $phrase,
166                         'rcpt'
167                                         .'-'
168                                         .(defined($rcpt->user()) ? $rcpt->user() : "NOUSER")
169                                         .".AT."
170                                         .(defined($rcpt->host()) ? $rcpt->host() : "LOCAL")
171                                         .'@jankratochvil.net',
172                         );
173 }
174
175 # RedHat sendmail-8.9.3-20/src/conf.c/HdrInfo[]/\Q/* destination fields */\E
176 # FIXME: Recognize "Resent-$_" headers for -t but when we are in 'resent' mode?
177 our @h_rcpt=(   # case in-sensitive!
178                 "To",
179                 "Cc",
180                 "Bcc",
181                 "Apparently-To",
182                 );
183 # ordering matters; first header found is substituted
184 # last header is subsituted if no one is found
185 our @h_from=(
186                 "Resent-From",
187                 "From",
188                 );
189
190
191 # My-Audit
192
193 # Setup profile names.
194 # First element of /^=/ form copies it referenced profile to be extended.
195 # 'did'    =>did() subroutine will return true for it.
196 # 'syslog' =>Use syslog(3).
197 # 'bell'   =>Bell sound.
198 # 'sms=\d+'=>Send SMS by WWW::SMS with specified maximum # of parts
199 our %audit_profile=(
200                 "btw"   =>[],
201                 "silent"=>["=btw"   ,"did"],
202                 "log"   =>["=silent","syslog"],
203                 "bell"  =>["=log"   ,"bell"],
204                 "sms"   =>["=bell"  ,"sms=1"],
205                 "crit"  =>["=sms"   ,"sms=3"],
206                 );
207 # Try the squeezing methods in this order:
208 our @sms_squeezes=(
209                 { "SqueezeControl"=>"noconv"                         },
210                 { "SqueezeControl"=>"conv"  ,"SQZ_OPTIMIZE_LEVEL"=>0 },
211                 { "SqueezeControl"=>"conv"  ,"SQZ_OPTIMIZE_LEVEL"=>1 },
212                 { "SqueezeControl"=>"med"   ,"SQZ_OPTIMIZE_LEVEL"=>0 },
213                 { "SqueezeControl"=>"med"   ,"SQZ_OPTIMIZE_LEVEL"=>1 },
214                 { "SqueezeControl"=>"max"   ,"SQZ_OPTIMIZE_LEVEL"=>0 },
215                 { "SqueezeControl"=>"max"   ,"SQZ_OPTIMIZE_LEVEL"=>1 },
216                 );
217 # Hostnames where we had alternate e-mail addresses:
218 our @alternates_host=(
219                 "jabberwock.ucw.cz",    # short@ucw.cz
220                 "atrey.karlin.mff.cuni.cz",     # short@atrey.karlin.mff.cuni.cz
221                 "k332.feld.cvut.cz",    # short@k332.feld.cvut.cz
222                 );
223 # Override DNS blacklists:
224 our @dnsbl_whitelist=(
225                 "195.250.128.83",       # smtp3.vol.cz; vol.cz.multistage.blackholes.five-ten-sg.com.
226                 "64.49.222.22",         # mail.pm.org: rackspace.com.spam-support.blackholes.five-ten-sg.com.
227                 "208.147.243.5",        # gambit.liquidcomm.net: cw.net.spam-support.blackholes.five-ten-sg.com.
228                 "213.235.135.70",       # smtp.tiscali.cz: tiscali.cz.multistage.blackholes.five-ten-sg.com.
229                 "205.139.198.11",       # eniac.disaster.com: cw.net.spam-support.blackholes.five-ten-sg.com.
230                 "127.0.0.2",                    # 2.0.0.127.relays.ordb.org.
231                 "65.113.40.131",        # bozo.vmware.com: qwest.net.spam-support.blackholes.five-ten-sg.com.
232                 "66.218.85.33",         # mta2.wss.scd.yahoo.com: yahoo.com.spam.blackholes.five-ten-sg.com.
233                 "212.80.76.42",         # mx2.seznam.cz: seznam.cz.free.blackholes.five-ten-sg.com.
234                 );
235
236 our $Audit;     # imported
237 our $procmailFROM_MAILER;       # imported
238 our $store_ignorenewmail;       # imported
239 our $store_profile;     # imported
240 our $store_ignore;      # imported
241 sub audit
242 {
243         $store_profile=undef();
244         # TODO: <short-m@> storage?
245
246         # never spawn new mail if FROM_MAILER
247         # $isFROM_MAILER postponed after maillists as they may look as FROM_MAILER
248         #use re 'debug';
249         my $isFROM_MAILER=$Audit->header()=~/$procmailFROM_MAILER/mio;
250         $store_ignorenewmail=(0
251                         || $isFROM_MAILER
252                         || headerhas "From",'<Regexp:^owner->'
253                         );
254
255         # spam honeypots
256         return if did sub {
257                 local $_;
258                 # Do not local $store_file as it is our-imported
259                 $store_profile="silent";
260                 store "=spam"         if grep /^\Qshort\@k332.feld.cvut.cz\E/i,Received_for();
261                 # TODO: foreign violation of RFC 822 section 4.4.4, Subject:.*Automatick.+odpov.+v.+nep.+tomnosti
262                 store "=spam"         if headeris "From",'<ghandchi@hotmail.com>';
263                 store "=spam"         if headeris "From",'<newsletter@levnapc.cz>';
264                 store "=spam"         if headeris "From",'<Tomas@dtpstudio.cz>';
265                 store "=spam"         if headeris "From",'<BNcom@email.bn.com>';
266                 store "=spam"         if headeris "From",'<e4luck@lists.opt4email.com>';
267                 store "=spam"         if headeris "From",'<mailcontests@lists.servitall.com>';
268                 store "=spam"         if headeris "From",'<canda@lica.cz>';
269                 {
270                         # weak detection: files with text/html w/o text/plain are usually a spam
271                         my @types_linear=map({ mime_type($_); } parts_linear());
272                         store "=spam"       if grep({ $_ eq "text/html"; } @types_linear) && !grep({ $_ eq "text/plain"; } @types_linear);
273                         }
274                 store "=spam"         if ($_=mimehead(body_first())->mime_attr("Content-Type.charset")) && /^big5/i;
275                 };
276         $store_profile=undef();
277
278         # spam detection
279         return if did sub {
280                 # Do not local $store_file as it is our-imported
281                 $store_profile="silent";
282                 local $_;
283                 store "=spam".($_ eq 1 ? "" : ";$_")      if $_=razor2();
284                 };
285         $store_profile=undef();
286         return if did sub {
287                 # Do not local $store_file as it is our-imported
288                 $store_profile="silent";
289                 local $_;
290                 store "=spam"                      .";$_","log" if $_=dnsbl '.relays.ordb.org.' ,1;     # all hosts
291                 store "=spam"                      .";$_","log" if $_=dnsbl '.blackholes.mail-abuse.org.' ,1;   # all hosts
292                 # we don't check all hosts as they can be "dialup" category, FIXME: check for it
293                 store "=spam"                      .";$_","log" if $_=dnsbl '.blackholes.five-ten-sg.com.',0; # just first
294                 # I don't send viruses but viruses propagate mails of mine
295                 store "=spam"                                   if headeris "X-Mailer",'ravmd/8.3.2';
296                 };
297         $store_profile=undef();
298
299         # special delivery
300         store "=err","bell" and return if headerhas \&Received_for,'<short+err@>';
301
302         # ppl-wished foreign remapping, Reply-To is left untouched!
303         # FIXME: modifications are now being dropped by &write_message!
304         header_remap("From",{
305                         'kerere@post.cz'               =>'kamzik@k332.feld.cvut.cz',
306                         'profes@mbox.vol.cz'           =>'kratochvilova@egp.cz',
307                         'jkrouzek@mbox.vol.cz'         =>'krouzek@mbox.fsv.cuni.cz',
308                         'jakub.gorner@lidovky.cz'      =>'tonda@disnet.cz',
309                         'jan.kolar@videoprogress.cz'   =>'jenda.kolar@volny.cz',
310                         'daniel.rulicek@cponline.cz'   =>'daniel.rulicek@cpress.cz',
311                         'pavel@suse.cz'                =>'pavel@ucw.cz',
312                         });
313
314         # My obsolete e-mail addresses
315         store_muttrc_alternates "=redirect-","btw";
316
317         # nasty public lists with $store_ignore
318         {
319                 # Do not local $store_file as it is our-imported
320                 $store_profile="log";
321                 local $store_ignore;
322                 $store_ignore="smsmail"    if 1==$Audit->body() && length(join "",$Audit->body())<180;  # SMS mail
323                 $store_ignore="sms OS"     if $Audit->subject()=~/^Email pro: /;        # "^Email pro: gsm@sh\.cvut\.cz$";
324                 $store_ignore="list-moron" if grep { headeris "From",$_; } qw(
325                                 <kempny@>
326                                 <help.me@wo.cz>
327                                 <mr.death@mail.cz>
328                                 <danx3@centrum.cz>
329                                 <@mujoskar.cz>
330                                 <satko@quanto.nr.sanet.sk>
331                                 <vithous@attorney.cz> <viroman@attorney.cz>
332                                 <konf@klain.cz>
333                                 <stein@tiscali.cz>
334                                 <barevnej@volny.cz>
335                                 );
336
337                 store "=gsm"               if headeris  "Sender"   ,'<owner-gsm@sh.cvut.cz>';
338                 store "=gsmpand"           if headeris  "List-Post",'<gsm@pandora.cz>';
339                 store "=9kc","log"         if headeris  "List-Post",'<n9k@pandora.cz>';
340                 store "=9kcd","log"        if headeris  "List-Post",'<dev9k@pandora.cz>';
341                 }
342         $store_profile=undef();
343
344         # lists
345         store "=mozillabug","log"    if headeris "From"     ,'<bugzilla-daemon@mozilla.org>';
346         store "=9ku","log"           if headeris "List-Id"  ,'<9000.listman.net>';
347         store "=9kd","log"           if headeris "Sender"   ,'<owner-9000-developers@geekstuff.co.uk>';
348         store "=spong","log"         if headeris "List-Id"  ,'<spong-users.lists.sourceforge.net>';
349         store "=gtkd","silent"       if headeris "List-Id"  ,'<gtk-devel-list.gnome.org>';
350         store "=gnomevfs","log"      if headeris "List-Id"  ,'<gnome-vfs-list.gnome.org>';
351         store "=mffstatnice","bell"  if headeris "List-Post",'<statnice@atrey.karlin.mff.cuni.cz>';
352         store "=hw","log"            if headeris "List-Post",'<hw-news@list.gin.cz>';
353         store "=gnokii","log"        if headeris "List-Id"  ,'<gnokii-users.mail.freesoftware.fsf.org>';
354         store "=winelic","log"       if headeris "List-Id"  ,'<wine-license.winehq.com>';
355         store "=wined","log"         if headeris "List-Id"  ,'<wine-devel.winehq.org>';
356         store "=winepat","silent"    if headeris "List-Id"  ,'<wine-patches.winehq.com>';
357         store "=winecvs","silent"    if headeris "List-Id"  ,'<wine-cvs.winehq.com>';
358         store "=wineann","log"       if headeris "List-Id"  ,'<wine-announce.winehq.com>';
359         store "=ros","log"           if headeris "List-Id"  ,'<ros-general.reactos.com>';
360         store "=roskernel","log"     if headeris "List-Id"  ,'<ros-kernel.reactos.com>';
361         store "=roscvs","silent"     if headeris "List-Id"  ,'<ros-cvs.reactos.com>';
362         store "=rosbug","log"        if headeris "Reply-To" ,'<scarab@reactos.wox.org>';
363         store "=fsd","silent"        if headeris "X-Mailing-List",'<linux-fsdevel@vger.kernel.org>';
364         store "=kerneld","silent"    if headeris "X-Mailing-List",'<linux-kernel@vger.kernel.org>';
365         store "=surprise","sms"      if headeris "List-Post",'<surprise@atrey.karlin.mff.cuni.cz>';
366         store "=surprisesuse","sms"  if headeris "Sender"   ,'<owner-surprise@suse.cz>';
367         store "=tacacs","log"        if headeris "Sender"   ,'<tacplus-l@disaster.com>';
368         store "=tacacs","log"        if headeris "Sender"   ,'<owner-tacplus-l@disaster.com>';
369         store "=tacacs","log"        if headeris "List-Id"  ,'<devel.lists.tacplus.org>';
370         store "=pm","log"            if headeris "Sender"   ,'<owner-prague-pm@pm.org>';
371         store "=radary","log"        if headeris "Reply-To" ,'<pha@radary.cz>';
372         store "=dnet","log"          if headeris "Sender"   ,'<@lists.distributed.net>';
373         store "=linux-input","log"   if headeris "List-Post",'<linux-input@atrey.karlin.mff.cuni.cz>';
374         store "=strom","bell"        if headeris "List-Post",'<vodni-strom@atrey.karlin.mff.cuni.cz>';
375         store "=netinfo","log"       if headeris "Sender"   ,'<owner-netinfo-l@vol.cz>';
376         store "=saintmj","log"       if headeris "From"     ,'<netsaint@kam-enterprise.ms.mff.cuni.cz>';
377         store "=saintmj","log"       if headeris "From"     ,'<netsaint@kam.mff.cuni.cz>';
378         store "=4cerr","bell"        if headeris "From"     ,'<owner-4cinfo@atrey.karlin.mff.cuni.cz>';
379         store "=4c","sms"            if headeris "List-Post",'<4cinfo@atrey.karlin.mff.cuni.cz>';
380         store "=slashdot","bell"     if headeris "From"     ,'<slashdot@slashdot.org>';
381         store "=freshmeat","bell"    if headeris "From"     ,'<noreply@freshmeat.net>';
382         store "=sourceforge","bell"  if headeris "From"     ,'<noreply@sourceforge.net>';
383         store "=gsmperlcvs","silent" if headeris("From"     ,'<johan@intra.tektonica.com>')
384                                         && $Audit->subject()=~/^'.*' has been updated!$/;
385         store "=libtoold","log"      if headeris "List-Id"  ,'<libtool.gnu.org>';
386         store "=libtoolpat","log"    if headeris "List-Id"  ,'<libtool-patches.gnu.org>';
387         store "=automake","log"      if headeris "List-Id"  ,'<automake.gnu.org>';
388         store "=autoconf","log"      if headeris "List-Id"  ,'<autoconf.gnu.org>';
389                                      if (headeris("From"    ,'<mailman-owner@vellum.cz>')
390                                          || headeris("From" ,'<captive-list-admin@jankratochvil.net>')
391                                          || headeris("From" ,'<captive-devel-list-admin@jankratochvil.net>')
392                                          || headeris("From" ,'<captive-announce-list-admin@jankratochvil.net>')) {
393                 store "=caperr","log";
394                 }
395         else {
396                 store "=cap","bell"        if headeris "List-Id"  ,'<captive-list.jankratochvil.net>';
397                 store "=capd","bell"       if headeris "List-Id"  ,'<captive-devel-list.jankratochvil.net>';
398                 store "=capann","bell"     if headeris "List-Id"  ,'<captive-announce-list.jankratochvil.net>';
399                 }
400         store "=ntfsann","log"       if headeris "List-Id"  ,'<linux-ntfs-announce.lists.sourceforge.net>';
401         store "=ntfsd","log"         if headeris "List-Id"  ,'<linux-ntfs-dev.lists.sourceforge.net>';
402         store "=orbit","log"         if headeris "List-Id"  ,'<orbit-list.gnome.org>';
403         store "=kand","log"          if headeris "List-Id"  ,'<devel.kannel.org>';
404         # own webs
405         store "=energie","bell"      if headeris "From"     ,qr/^EnergieWeb/;
406         store "=ats","log"           if headeris("From"     ,'<root@ms.atspraha.cz>')
407                                         || (headeris("From",'<online@ringier.cz>') && headerhas("To",'<blesk@atspraha.cz>'));
408         store "=atscasablanca","log" if headeris "From"     ,'<casablanca@ms.atspraha.cz>';
409         store "=www-sms","log"       if headeris "List-Id"  ,'<www-sms-developers.lists.sourceforge.net>';
410
411         # Petr Koutecky does not mark his Stuff
412         store "=koutecky","log"      if headeris "From"     ,'<velkyhroch@seznam.cz>';
413
414         store "=errm","bell"         if $isFROM_MAILER && !did();
415
416         store "==","sms"             if !did;
417 }
418
419 sub audit_sms_address
420 {
421 my($obj)=@_;
422
423         my $address=$obj->address();
424         if (my $alternates=muttrc_get("alternates")) {
425                 return "I" if $address=~/$alternates/si;
426                 }
427         my %aliases=muttrc_aliases();
428         if (my $alias=$aliases{lc $address}) {
429                 local $_=$alias;
430                 s/\b(Bus)siness$/$1/i;
431                 s/\.ident$//i;
432                 return $_;
433                 }
434         local $_=$address;
435         s/\.cz$//i;
436         return $_;
437 }
438
439 # $args{"from"}
440 # $args{"subject"}
441 # $args{"body"}
442 sub audit_sms
443 {
444 my(%args)=@_;
445
446         my $from=(@{$args{"from"}} ? join(",",map({ audit_sms_address($_); } @{$args{"from"}})) : "?");
447         local $_;
448
449         $_=$args{"subject"};
450         # headers
451         s/(?:Re|Aw|Odp|Fw|Fwd|OT)(?:\[\d+\])?://ig;
452         # former subject
453         s/\bbylo:.*$//i;
454         s/\[\s*WAS:.*\]\s*$//i;
455         # trim
456         s/^\s*//s;
457         s/\s*$//s;
458         my $subject=$_;
459
460         $_=$args{"body"};
461         # max. 9 lines of .sig
462         s/\n-- (?:\n[^\n]*){0,9}$//gs;
463         # "Original Message"/"Puvodni zprava" etc. up to empty line
464         # "- - - Original message: - - -" is by "Lotus Notes Release 5.0.5  September 22, 2000"
465         s/(^|\n)[\s^\n]*(?:-----[\w\s]*-----|- - - Original message: - - -)[\s^\n]*(?:\n[^\n]+)*\n{2,}(?:\s*[^>\s].*$)?/\n/gs;
466         # Remove "..." lines (is it used by anyone except me?)
467         s/^\Q...\E$/*/gm;
468         # quoting "> "
469         s/^(?:\s*[[:upper:]]{0,3}>)+.*$/*/gm;
470         s/(?:^|\n)(?:\*\n+)+/\n*\n/gs;
471         # attributions
472         s/^.*\b(?:wrote|writes|napsal jste):\s*$//gm;
473         my $body=$_;
474
475         return [$from,"($subject)$body"];
476 }
477
478 1;