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| -rw-r--r-- | contrib/README.mm-handler-2.1.10 | 29 | ||||
| -rw-r--r-- | contrib/mm-handler-2.1.10 | 295 |
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diff --git a/contrib/README.mm-handler-2.1.10 b/contrib/README.mm-handler-2.1.10 new file mode 100644 index 00000000..579f3e44 --- /dev/null +++ b/contrib/README.mm-handler-2.1.10 @@ -0,0 +1,29 @@ +mm-handler-2.1.10 is based on the original mm-handler. See README.mm-handler +for much important information that is not repeated here. + +This version was updated by David Champion <dgc@uchicago.edu> to add the +ability to select a subset of list addresses to accept and to add switches +to not generate bounces for non-existent lists and unaccepted or invalid +list addresses. It was further debugged and polished by Kenneth Porter +<shiva@sewingwitch.com>. + +Kenneth added syslog logging using the perl Unix::Syslog module (available +from CPAN and other repositories). If you don't have that module, you must +either install it or remove the module references and syslog references from +mm-handler-2.1.10. + +This is a work in progress. The major thing left to do is to arrange for +it to exit with an appropriate exit code (e.g. EX_NOUSER or EX_UNAVAILABLE) +when the message is undeliverable. This in turn requires that mm-handler +be invoked separately for each message recipient address. The sample +mailman.mc file is set up this way and mentions that the 'm' and 'n' flags +should not be used, but mm-handler contains an address processing loop in +case the 'm' flag is included in it's invocation. This should be changed +to log an appropriate error if mm-handler is invoked with multiple recipient +addresses. + +See the threads "before next release: disable backscatter in default +installation", "anti-backscatter mm-handler ..." and "mm-handler 2.1.10 ..." +at <http://mail.python.org/pipermail/mailman-developers/2008-March/thread.html> +for background and further information. + diff --git a/contrib/mm-handler-2.1.10 b/contrib/mm-handler-2.1.10 new file mode 100644 index 00000000..a920b10d --- /dev/null +++ b/contrib/mm-handler-2.1.10 @@ -0,0 +1,295 @@ +#!/usr/bin/perl +## +## Sendmail mailer for Mailman +## +## Simulates these aliases: +## +##testlist: "|/home/mailman/mail/mailman post testlist" +##testlist-admin: "|/home/mailman/mail/mailman admin testlist" +##testlist-bounces: "|/home/mailman/mail/mailman bounces testlist" +##testlist-confirm: "|/home/mailman/mail/mailman confirm testlist" +##testlist-join: "|/home/mailman/mail/mailman join testlist" +##testlist-leave: "|/home/mailman/mail/mailman leave testlist" +##testlist-owner: "|/home/mailman/mail/mailman owner testlist" +##testlist-request: "|/home/mailman/mail/mailman request testlist" +##testlist-subscribe: "|/home/mailman/mail/mailman subscribe testlist" +##testlist-unsubscribe: "|/home/mailman/mail/mailman unsubscribe testlist" +##owner-testlist: testlist-owner + +#### Begin configuration here #### + +$MMWRAPPER = "/usr/lib/mailman/mail/mailman"; +$MMLISTDIR = "/var/lib/mailman/lists"; +$SENDMAIL = "/usr/lib/sendmail -oem -oi"; +$VERSION = '$Id: mm-handler 2.1.10 2008-04-14 00:00:00 $'; + +## Comment this if you offer local user addresses. +$NOUSERS = "\nPersonal e-mail addresses are not offered by this server."; + +# set for debugging.... +$DEBUG = 0; + +# Define the set of actions you want to allow (that is, which aliases +# you want to emulate). This should be a subset of @ValidActions, +# defined below, plus the special "post" action. +#@ApprovedActions = qw(admin bounces confirm join leave +# owner request subscribe unsubscribe); +# aliases removed to suppress spam backscatter +@ApprovedActions = qw(bounces confirm owner request post); + +# Allow backscatter for unapproved actions? +$BounceUnapproved = 0; + +# Allow backscatter for undefined lists? +$BounceNonlist = 0; + +#### End of configuration #### + + +use FileHandle; +use Sys::Hostname; +use Socket; +use Unix::Syslog qw(:macros); +use Unix::Syslog qw(:subs); +use File::Basename; + +my $syslog_ident = basename $0; +my $syslog_options = LOG_PID; +my $syslog_facility = LOG_MAIL; + +# These are the listname-action actions defined by the mailman wrapper +# program. Do not alter this unless a new Mailman version changes the +# set of supported actions. +@ValidActions = qw(admin bounces confirm join leave + owner request subscribe unsubscribe); + +($VERS_STR = $VERSION) =~ s/^\$\S+\s+(\S+)(?:,v)?\s+(\S+\s+\S+\s+\S+).*/\1 \2/; + +$BOUNDARY = sprintf("%08x-%d", time, time % $$); + +## Informative, non-standard rejection letter +sub mail_error { + my ($in, $to, $list, $server, $reason) = @_; + my $sendmail; + + if ($server && $server ne "") { + $servname = $server; + } else { + $servname = "This server"; + $server = &get_ip_addr; + } + + #$sendmail = new FileHandle ">/tmp/mm-$$"; + $sendmail = new FileHandle "|$SENDMAIL $to"; + if (!defined($sendmail)) { + syslog LOG_ERR, "cannot exec \"$SENDMAIL\""; + exit (-1); + } + + $sendmail->print ("From: MAILER-DAEMON\@$server +To: $to +Subject: Returned mail: List unknown +Mime-Version: 1.0 +Content-type: multipart/mixed; boundary=\"$BOUNDARY\" +Content-Disposition: inline + +--$BOUNDARY +Content-Type: text/plain; charset=us-ascii +Content-Description: Error processing your mail +Content-Disposition: inline + +Your mail for $list could not be sent: + $reason + +For a list of publicly-advertised mailing lists hosted on this server, +visit this URL: + http://$server/ + +If this does not resolve your problem, you may write to: + postmaster\@$server +or + mailman-owner\@$server + + +$servname delivers e-mail to registered mailing lists +and to the administrative addresses defined and required by IETF +Request for Comments (RFC) 2142 [1]. +$NOUSERS + +The Internet Engineering Task Force [2] (IETF) oversees the development +of open standards for the Internet community, including the protocols +and formats employed by Internet mail systems. + +For your convenience, your original mail is attached. + + +[1] Crocker, D. \"Mailbox Names for Common Services, Roles and + Functions\". http://www.ietf.org/rfc/rfc2142.txt + +[2] http://www.ietf.org/ + +--$BOUNDARY +Content-Type: message/rfc822 +Content-Description: Your undelivered mail +Content-Disposition: attachment + +"); + + while ($_ = <$in>) { + $sendmail->print ($_); + } + + $sendmail->print ("\n"); + $sendmail->print ("--$BOUNDARY--\n"); + + close($sendmail); +} + +## Get my IP address, in case my sendmail doesn't tell me my name. +sub get_ip_addr { + my $host = hostname; + my $ip = gethostbyname($host); + return inet_ntoa($ip); +} + +## Split an address into its base list name and the appropriate command +## for the relevant function. +sub split_addr { + my ($addr) = @_; + my ($list, $cmd); + + if ($addr =~ /(.*)-([^-]+)\+.*$/) { + $list = $1; + $cmd = "$2"; + } elsif ($addr =~ /(.*)-([^-]+)$/) { + $list = $1; + $cmd = $2; + } + else { + return ($addr, "post"); + } + if ($list eq "owner") { + # Allow owner-listname to work as listname-owner + $list = $cmd; + $cmd = "owner"; + } elsif (! grep /^$cmd$/, @ValidActions) { + # If an undefined action, restore list name + $list = $addr; + $cmd = "post"; + } + ## Otherwise use $list and $cmd as already assigned + + return ($list, $cmd); +} + +## Determine whether a list is defined in Mailman. +sub list_exists { + my ($name) = @_; + + return 1 if (-f "$MMLISTDIR/$list/config.pck"); + return 1 if (-f "$MMLISTDIR/$list/config.db"); + return 0; +} + +## The time, formatted as for an mbox's "From_" line. +sub mboxdate { + my ($time) = @_; + my @days = qw(Sun Mon Tue Wed Thu Fri Sat); + my @months = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); + my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = + localtime($time); + + ## Two-digit year handling complies with RFC 2822 (section 4.3), + ## with the addition that three-digit years are accommodated. + if ($year < 50) { + $year += 2000; + } elsif ($year < 1900) { + $year += 1900; + } + + return sprintf ("%s %s %2d %02d:%02d:%02d %d", + $days[$wday], $months[$mon], $mday, + $hour, $min, $sec, $year); +} + +BEGIN: { + openlog $syslog_ident, $syslog_options, $syslog_facility; + $sender = undef; + $server = undef; + @to = (); + while ($#ARGV >= 0) { + if ($ARGV[0] eq "-r") { + $sender = $ARGV[1]; + shift @ARGV; + } elsif (!defined($server)) { + $server = $ARGV[0]; + } else { + push(@to, $ARGV[0]); + } + shift @ARGV; + } + + if ($DEBUG) { + my $to = join(',', @to); + syslog LOG_INFO, "to: $to; sender: $sender; server: $server"; + } + +ADDR: for $addr (@to) { + $prev = undef; + $list = $addr; + + $was_to = $addr; + $was_to .= "\@$server" if ("$server" ne ""); + + $cmd= "post"; + ($list, $cmd) = &split_addr($list); + if ($DEBUG) { + syslog LOG_INFO, "list: $list; cmd: $cmd"; + } + if (! &list_exists($list)) { + syslog LOG_INFO, "no list named \"$list\" is known by $server"; + if ($BounceNonlist) { + mail_error(\*STDIN, $sender, $was_to, $server, + "no list named \"$list\" is known by $server"); + } + next ADDR; + } + + if (! grep /^$cmd$/, @ApprovedActions) { + syslog LOG_INFO, "$cmd is not a recognized action for $list"; + if ($BounceUnapproved) { + mail_error(\*STDIN, $sender, $was_to, $server, + "$cmd is not a recognized action for $list"); + } + next ADDR; + } + + if ($DEBUG) { + syslog LOG_INFO, "invoking $MMWRAPPER"; + } + $wrapper = new FileHandle "|$MMWRAPPER $cmd $list"; + if (!defined($wrapper)) { + ## Defer? + syslog LOG_ERR, "cannot exec ", + "\"$MMWRAPPER $cmd $list\": deferring"; + exit (-1); + } + + # Don't need these without the "n" flag on the mailer def.... + #$date = &mboxdate(time); + #$wrapper->print ("From $sender $date\n"); + + # ...because we use these instead. + $from_ = <STDIN>; + $wrapper->print ($from_); + + $wrapper->print ("X-Mailman-Handler: $VERSION\n"); + while (<STDIN>) { + $wrapper->print ($_); + } + close($wrapper); + if ($DEBUG) { + syslog LOG_INFO, "message processed"; + } + } +} |