summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl0/lib/Net/SMTP.pm
diff options
context:
space:
mode:
Diffstat (limited to 'Master/tlpkg/tlperl0/lib/Net/SMTP.pm')
-rwxr-xr-xMaster/tlpkg/tlperl0/lib/Net/SMTP.pm867
1 files changed, 867 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl0/lib/Net/SMTP.pm b/Master/tlpkg/tlperl0/lib/Net/SMTP.pm
new file mode 100755
index 00000000000..a28496d6886
--- /dev/null
+++ b/Master/tlpkg/tlperl0/lib/Net/SMTP.pm
@@ -0,0 +1,867 @@
+# Net::SMTP.pm
+#
+# Copyright (c) 1995-2004 Graham Barr <gbarr@pobox.com>. All rights reserved.
+# This program is free software; you can redistribute it and/or
+# modify it under the same terms as Perl itself.
+
+package Net::SMTP;
+
+require 5.001;
+
+use strict;
+use vars qw($VERSION @ISA);
+use Socket 1.3;
+use Carp;
+use IO::Socket;
+use Net::Cmd;
+use Net::Config;
+
+$VERSION = "2.31";
+
+@ISA = qw(Net::Cmd IO::Socket::INET);
+
+
+sub new {
+ my $self = shift;
+ my $type = ref($self) || $self;
+ my ($host, %arg);
+ if (@_ % 2) {
+ $host = shift;
+ %arg = @_;
+ }
+ else {
+ %arg = @_;
+ $host = delete $arg{Host};
+ }
+ my $hosts = defined $host ? $host : $NetConfig{smtp_hosts};
+ my $obj;
+
+ my $h;
+ foreach $h (@{ref($hosts) ? $hosts : [$hosts]}) {
+ $obj = $type->SUPER::new(
+ PeerAddr => ($host = $h),
+ PeerPort => $arg{Port} || 'smtp(25)',
+ LocalAddr => $arg{LocalAddr},
+ LocalPort => $arg{LocalPort},
+ Proto => 'tcp',
+ Timeout => defined $arg{Timeout}
+ ? $arg{Timeout}
+ : 120
+ )
+ and last;
+ }
+
+ return undef
+ unless defined $obj;
+
+ $obj->autoflush(1);
+
+ $obj->debug(exists $arg{Debug} ? $arg{Debug} : undef);
+
+ unless ($obj->response() == CMD_OK) {
+ $obj->close();
+ return undef;
+ }
+
+ ${*$obj}{'net_smtp_exact_addr'} = $arg{ExactAddresses};
+ ${*$obj}{'net_smtp_host'} = $host;
+
+ (${*$obj}{'net_smtp_banner'}) = $obj->message;
+ (${*$obj}{'net_smtp_domain'}) = $obj->message =~ /\A\s*(\S+)/;
+
+ unless ($obj->hello($arg{Hello} || "")) {
+ $obj->close();
+ return undef;
+ }
+
+ $obj;
+}
+
+
+sub host {
+ my $me = shift;
+ ${*$me}{'net_smtp_host'};
+}
+
+##
+## User interface methods
+##
+
+
+sub banner {
+ my $me = shift;
+
+ return ${*$me}{'net_smtp_banner'} || undef;
+}
+
+
+sub domain {
+ my $me = shift;
+
+ return ${*$me}{'net_smtp_domain'} || undef;
+}
+
+
+sub etrn {
+ my $self = shift;
+ defined($self->supports('ETRN', 500, ["Command unknown: 'ETRN'"]))
+ && $self->_ETRN(@_);
+}
+
+
+sub auth {
+ my ($self, $username, $password) = @_;
+
+ eval {
+ require MIME::Base64;
+ require Authen::SASL;
+ } or $self->set_status(500, ["Need MIME::Base64 and Authen::SASL todo auth"]), return 0;
+
+ my $mechanisms = $self->supports('AUTH', 500, ["Command unknown: 'AUTH'"]);
+ return unless defined $mechanisms;
+
+ my $sasl;
+
+ if (ref($username) and UNIVERSAL::isa($username, 'Authen::SASL')) {
+ $sasl = $username;
+ $sasl->mechanism($mechanisms);
+ }
+ else {
+ die "auth(username, password)" if not length $username;
+ $sasl = Authen::SASL->new(
+ mechanism => $mechanisms,
+ callback => {
+ user => $username,
+ pass => $password,
+ authname => $username,
+ }
+ );
+ }
+
+ # We should probably allow the user to pass the host, but I don't
+ # currently know and SASL mechanisms that are used by smtp that need it
+ my $client = $sasl->client_new('smtp', ${*$self}{'net_smtp_host'}, 0);
+ my $str = $client->client_start;
+
+ # We dont support sasl mechanisms that encrypt the socket traffic.
+ # todo that we would really need to change the ISA hierarchy
+ # so we dont inherit from IO::Socket, but instead hold it in an attribute
+
+ my @cmd = ("AUTH", $client->mechanism);
+ my $code;
+
+ push @cmd, MIME::Base64::encode_base64($str, '')
+ if defined $str and length $str;
+
+ while (($code = $self->command(@cmd)->response()) == CMD_MORE) {
+ @cmd = (
+ MIME::Base64::encode_base64(
+ $client->client_step(MIME::Base64::decode_base64(($self->message)[0])), ''
+ )
+ );
+ }
+
+ $code == CMD_OK;
+}
+
+
+sub hello {
+ my $me = shift;
+ my $domain = shift || "localhost.localdomain";
+ my $ok = $me->_EHLO($domain);
+ my @msg = $me->message;
+
+ if ($ok) {
+ my $h = ${*$me}{'net_smtp_esmtp'} = {};
+ my $ln;
+ foreach $ln (@msg) {
+ $h->{uc $1} = $2
+ if $ln =~ /(\w+)\b[= \t]*([^\n]*)/;
+ }
+ }
+ elsif ($me->status == CMD_ERROR) {
+ @msg = $me->message
+ if $ok = $me->_HELO($domain);
+ }
+
+ return undef unless $ok;
+
+ $msg[0] =~ /\A\s*(\S+)/;
+ return ($1 || " ");
+}
+
+
+sub supports {
+ my $self = shift;
+ my $cmd = uc shift;
+ return ${*$self}{'net_smtp_esmtp'}->{$cmd}
+ if exists ${*$self}{'net_smtp_esmtp'}->{$cmd};
+ $self->set_status(@_)
+ if @_;
+ return;
+}
+
+
+sub _addr {
+ my $self = shift;
+ my $addr = shift;
+ $addr = "" unless defined $addr;
+
+ if (${*$self}{'net_smtp_exact_addr'}) {
+ return $1 if $addr =~ /^\s*(<.*>)\s*$/s;
+ }
+ else {
+ return $1 if $addr =~ /(<[^>]*>)/;
+ $addr =~ s/^\s+|\s+$//sg;
+ }
+
+ "<$addr>";
+}
+
+
+sub mail {
+ my $me = shift;
+ my $addr = _addr($me, shift);
+ my $opts = "";
+
+ if (@_) {
+ my %opt = @_;
+ my ($k, $v);
+
+ if (exists ${*$me}{'net_smtp_esmtp'}) {
+ my $esmtp = ${*$me}{'net_smtp_esmtp'};
+
+ if (defined($v = delete $opt{Size})) {
+ if (exists $esmtp->{SIZE}) {
+ $opts .= sprintf " SIZE=%d", $v + 0;
+ }
+ else {
+ carp 'Net::SMTP::mail: SIZE option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{Return})) {
+ if (exists $esmtp->{DSN}) {
+ $opts .= " RET=" . ((uc($v) eq "FULL") ? "FULL" : "HDRS");
+ }
+ else {
+ carp 'Net::SMTP::mail: DSN option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{Bits})) {
+ if ($v eq "8") {
+ if (exists $esmtp->{'8BITMIME'}) {
+ $opts .= " BODY=8BITMIME";
+ }
+ else {
+ carp 'Net::SMTP::mail: 8BITMIME option not supported by host';
+ }
+ }
+ elsif ($v eq "binary") {
+ if (exists $esmtp->{'BINARYMIME'} && exists $esmtp->{'CHUNKING'}) {
+ $opts .= " BODY=BINARYMIME";
+ ${*$me}{'net_smtp_chunking'} = 1;
+ }
+ else {
+ carp 'Net::SMTP::mail: BINARYMIME option not supported by host';
+ }
+ }
+ elsif (exists $esmtp->{'8BITMIME'} or exists $esmtp->{'BINARYMIME'}) {
+ $opts .= " BODY=7BIT";
+ }
+ else {
+ carp 'Net::SMTP::mail: 8BITMIME and BINARYMIME options not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{Transaction})) {
+ if (exists $esmtp->{CHECKPOINT}) {
+ $opts .= " TRANSID=" . _addr($me, $v);
+ }
+ else {
+ carp 'Net::SMTP::mail: CHECKPOINT option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{Envelope})) {
+ if (exists $esmtp->{DSN}) {
+ $v =~ s/([^\041-\176]|=|\+)/sprintf "+%02x", ord($1)/sge;
+ $opts .= " ENVID=$v";
+ }
+ else {
+ carp 'Net::SMTP::mail: DSN option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{ENVID})) {
+
+ # expected to be in a format as required by RFC 3461, xtext-encoded
+ if (exists $esmtp->{DSN}) {
+ $opts .= " ENVID=$v";
+ }
+ else {
+ carp 'Net::SMTP::mail: DSN option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{AUTH})) {
+
+ # expected to be in a format as required by RFC 2554,
+ # rfc2821-quoted and xtext-encoded, or <>
+ if (exists $esmtp->{AUTH}) {
+ $v = '<>' if !defined($v) || $v eq '';
+ $opts .= " AUTH=$v";
+ }
+ else {
+ carp 'Net::SMTP::mail: AUTH option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{XVERP})) {
+ if (exists $esmtp->{'XVERP'}) {
+ $opts .= " XVERP";
+ }
+ else {
+ carp 'Net::SMTP::mail: XVERP option not supported by host';
+ }
+ }
+
+ carp 'Net::SMTP::recipient: unknown option(s) ' . join(" ", keys %opt) . ' - ignored'
+ if scalar keys %opt;
+ }
+ else {
+ carp 'Net::SMTP::mail: ESMTP not supported by host - options discarded :-(';
+ }
+ }
+
+ $me->_MAIL("FROM:" . $addr . $opts);
+}
+
+
+sub send { my $me = shift; $me->_SEND("FROM:" . _addr($me, $_[0])) }
+sub send_or_mail { my $me = shift; $me->_SOML("FROM:" . _addr($me, $_[0])) }
+sub send_and_mail { my $me = shift; $me->_SAML("FROM:" . _addr($me, $_[0])) }
+
+
+sub reset {
+ my $me = shift;
+
+ $me->dataend()
+ if (exists ${*$me}{'net_smtp_lastch'});
+
+ $me->_RSET();
+}
+
+
+sub recipient {
+ my $smtp = shift;
+ my $opts = "";
+ my $skip_bad = 0;
+
+ if (@_ && ref($_[-1])) {
+ my %opt = %{pop(@_)};
+ my $v;
+
+ $skip_bad = delete $opt{'SkipBad'};
+
+ if (exists ${*$smtp}{'net_smtp_esmtp'}) {
+ my $esmtp = ${*$smtp}{'net_smtp_esmtp'};
+
+ if (defined($v = delete $opt{Notify})) {
+ if (exists $esmtp->{DSN}) {
+ $opts .= " NOTIFY=" . join(",", map { uc $_ } @$v);
+ }
+ else {
+ carp 'Net::SMTP::recipient: DSN option not supported by host';
+ }
+ }
+
+ if (defined($v = delete $opt{ORcpt})) {
+ if (exists $esmtp->{DSN}) {
+ $opts .= " ORCPT=" . $v;
+ }
+ else {
+ carp 'Net::SMTP::recipient: DSN option not supported by host';
+ }
+ }
+
+ carp 'Net::SMTP::recipient: unknown option(s) ' . join(" ", keys %opt) . ' - ignored'
+ if scalar keys %opt;
+ }
+ elsif (%opt) {
+ carp 'Net::SMTP::recipient: ESMTP not supported by host - options discarded :-(';
+ }
+ }
+
+ my @ok;
+ my $addr;
+ foreach $addr (@_) {
+ if ($smtp->_RCPT("TO:" . _addr($smtp, $addr) . $opts)) {
+ push(@ok, $addr) if $skip_bad;
+ }
+ elsif (!$skip_bad) {
+ return 0;
+ }
+ }
+
+ return $skip_bad ? @ok : 1;
+}
+
+BEGIN {
+ *to = \&recipient;
+ *cc = \&recipient;
+ *bcc = \&recipient;
+}
+
+
+sub data {
+ my $me = shift;
+
+ if (exists ${*$me}{'net_smtp_chunking'}) {
+ carp 'Net::SMTP::data: CHUNKING extension in use, must call bdat instead';
+ }
+ else {
+ my $ok = $me->_DATA() && $me->datasend(@_);
+
+ $ok && @_
+ ? $me->dataend
+ : $ok;
+ }
+}
+
+
+sub bdat {
+ my $me = shift;
+
+ if (exists ${*$me}{'net_smtp_chunking'}) {
+ my $data = shift;
+
+ $me->_BDAT(length $data)
+ && $me->rawdatasend($data)
+ && $me->response() == CMD_OK;
+ }
+ else {
+ carp 'Net::SMTP::bdat: CHUNKING extension is not in use, call data instead';
+ }
+}
+
+
+sub bdatlast {
+ my $me = shift;
+
+ if (exists ${*$me}{'net_smtp_chunking'}) {
+ my $data = shift;
+
+ $me->_BDAT(length $data, "LAST")
+ && $me->rawdatasend($data)
+ && $me->response() == CMD_OK;
+ }
+ else {
+ carp 'Net::SMTP::bdat: CHUNKING extension is not in use, call data instead';
+ }
+}
+
+
+sub datafh {
+ my $me = shift;
+ return unless $me->_DATA();
+ return $me->tied_fh;
+}
+
+
+sub expand {
+ my $me = shift;
+
+ $me->_EXPN(@_)
+ ? ($me->message)
+ : ();
+}
+
+
+sub verify { shift->_VRFY(@_) }
+
+
+sub help {
+ my $me = shift;
+
+ $me->_HELP(@_)
+ ? scalar $me->message
+ : undef;
+}
+
+
+sub quit {
+ my $me = shift;
+
+ $me->_QUIT;
+ $me->close;
+}
+
+
+sub DESTROY {
+
+ # ignore
+}
+
+##
+## RFC821 commands
+##
+
+
+sub _EHLO { shift->command("EHLO", @_)->response() == CMD_OK }
+sub _HELO { shift->command("HELO", @_)->response() == CMD_OK }
+sub _MAIL { shift->command("MAIL", @_)->response() == CMD_OK }
+sub _RCPT { shift->command("RCPT", @_)->response() == CMD_OK }
+sub _SEND { shift->command("SEND", @_)->response() == CMD_OK }
+sub _SAML { shift->command("SAML", @_)->response() == CMD_OK }
+sub _SOML { shift->command("SOML", @_)->response() == CMD_OK }
+sub _VRFY { shift->command("VRFY", @_)->response() == CMD_OK }
+sub _EXPN { shift->command("EXPN", @_)->response() == CMD_OK }
+sub _HELP { shift->command("HELP", @_)->response() == CMD_OK }
+sub _RSET { shift->command("RSET")->response() == CMD_OK }
+sub _NOOP { shift->command("NOOP")->response() == CMD_OK }
+sub _QUIT { shift->command("QUIT")->response() == CMD_OK }
+sub _DATA { shift->command("DATA")->response() == CMD_MORE }
+sub _BDAT { shift->command("BDAT", @_) }
+sub _TURN { shift->unsupported(@_); }
+sub _ETRN { shift->command("ETRN", @_)->response() == CMD_OK }
+sub _AUTH { shift->command("AUTH", @_)->response() == CMD_OK }
+
+1;
+
+__END__
+
+=head1 NAME
+
+Net::SMTP - Simple Mail Transfer Protocol Client
+
+=head1 SYNOPSIS
+
+ use Net::SMTP;
+
+ # Constructors
+ $smtp = Net::SMTP->new('mailhost');
+ $smtp = Net::SMTP->new('mailhost', Timeout => 60);
+
+=head1 DESCRIPTION
+
+This module implements a client interface to the SMTP and ESMTP
+protocol, enabling a perl5 application to talk to SMTP servers. This
+documentation assumes that you are familiar with the concepts of the
+SMTP protocol described in RFC821.
+
+A new Net::SMTP object must be created with the I<new> method. Once
+this has been done, all SMTP commands are accessed through this object.
+
+The Net::SMTP class is a subclass of Net::Cmd and IO::Socket::INET.
+
+=head1 EXAMPLES
+
+This example prints the mail domain name of the SMTP server known as mailhost:
+
+ #!/usr/local/bin/perl -w
+
+ use Net::SMTP;
+
+ $smtp = Net::SMTP->new('mailhost');
+ print $smtp->domain,"\n";
+ $smtp->quit;
+
+This example sends a small message to the postmaster at the SMTP server
+known as mailhost:
+
+ #!/usr/local/bin/perl -w
+
+ use Net::SMTP;
+
+ $smtp = Net::SMTP->new('mailhost');
+
+ $smtp->mail($ENV{USER});
+ $smtp->to('postmaster');
+
+ $smtp->data();
+ $smtp->datasend("To: postmaster\n");
+ $smtp->datasend("\n");
+ $smtp->datasend("A simple test message\n");
+ $smtp->dataend();
+
+ $smtp->quit;
+
+=head1 CONSTRUCTOR
+
+=over 4
+
+=item new ( [ HOST ] [, OPTIONS ] )
+
+This is the constructor for a new Net::SMTP object. C<HOST> is the
+name of the remote host to which an SMTP connection is required.
+
+C<HOST> is optional. If C<HOST> is not given then it may instead be
+passed as the C<Host> option described below. If neither is given then
+the C<SMTP_Hosts> specified in C<Net::Config> will be used.
+
+C<OPTIONS> are passed in a hash like fashion, using key and value pairs.
+Possible options are:
+
+B<Hello> - SMTP requires that you identify yourself. This option
+specifies a string to pass as your mail domain. If not given localhost.localdomain
+will be used.
+
+B<Host> - SMTP host to connect to. It may be a single scalar, as defined for
+the C<PeerAddr> option in L<IO::Socket::INET>, or a reference to
+an array with hosts to try in turn. The L</host> method will return the value
+which was used to connect to the host.
+
+B<LocalAddr> and B<LocalPort> - These parameters are passed directly
+to IO::Socket to allow binding the socket to a local port.
+
+B<Timeout> - Maximum time, in seconds, to wait for a response from the
+SMTP server (default: 120)
+
+B<ExactAddresses> - If true the all ADDRESS arguments must be as
+defined by C<addr-spec> in RFC2822. If not given, or false, then
+Net::SMTP will attempt to extract the address from the value passed.
+
+B<Debug> - Enable debugging information
+
+
+Example:
+
+
+ $smtp = Net::SMTP->new('mailhost',
+ Hello => 'my.mail.domain',
+ Timeout => 30,
+ Debug => 1,
+ );
+
+ # the same
+ $smtp = Net::SMTP->new(
+ Host => 'mailhost',
+ Hello => 'my.mail.domain',
+ Timeout => 30,
+ Debug => 1,
+ );
+
+ # Connect to the default server from Net::config
+ $smtp = Net::SMTP->new(
+ Hello => 'my.mail.domain',
+ Timeout => 30,
+ );
+
+=back
+
+=head1 METHODS
+
+Unless otherwise stated all methods return either a I<true> or I<false>
+value, with I<true> meaning that the operation was a success. When a method
+states that it returns a value, failure will be returned as I<undef> or an
+empty list.
+
+=over 4
+
+=item banner ()
+
+Returns the banner message which the server replied with when the
+initial connection was made.
+
+=item domain ()
+
+Returns the domain that the remote SMTP server identified itself as during
+connection.
+
+=item hello ( DOMAIN )
+
+Tell the remote server the mail domain which you are in using the EHLO
+command (or HELO if EHLO fails). Since this method is invoked
+automatically when the Net::SMTP object is constructed the user should
+normally not have to call it manually.
+
+=item host ()
+
+Returns the value used by the constructor, and passed to IO::Socket::INET,
+to connect to the host.
+
+=item etrn ( DOMAIN )
+
+Request a queue run for the DOMAIN given.
+
+=item auth ( USERNAME, PASSWORD )
+
+Attempt SASL authentication.
+
+=item mail ( ADDRESS [, OPTIONS] )
+
+=item send ( ADDRESS )
+
+=item send_or_mail ( ADDRESS )
+
+=item send_and_mail ( ADDRESS )
+
+Send the appropriate command to the server MAIL, SEND, SOML or SAML. C<ADDRESS>
+is the address of the sender. This initiates the sending of a message. The
+method C<recipient> should be called for each address that the message is to
+be sent to.
+
+The C<mail> method can some additional ESMTP OPTIONS which is passed
+in hash like fashion, using key and value pairs. Possible options are:
+
+ Size => <bytes>
+ Return => "FULL" | "HDRS"
+ Bits => "7" | "8" | "binary"
+ Transaction => <ADDRESS>
+ Envelope => <ENVID> # xtext-encodes its argument
+ ENVID => <ENVID> # similar to Envelope, but expects argument encoded
+ XVERP => 1
+ AUTH => <submitter> # encoded address according to RFC 2554
+
+The C<Return> and C<Envelope> parameters are used for DSN (Delivery
+Status Notification).
+
+The submitter address in C<AUTH> option is expected to be in a format as
+required by RFC 2554, in an RFC2821-quoted form and xtext-encoded, or <> .
+
+=item reset ()
+
+Reset the status of the server. This may be called after a message has been
+initiated, but before any data has been sent, to cancel the sending of the
+message.
+
+=item recipient ( ADDRESS [, ADDRESS, [...]] [, OPTIONS ] )
+
+Notify the server that the current message should be sent to all of the
+addresses given. Each address is sent as a separate command to the server.
+Should the sending of any address result in a failure then the process is
+aborted and a I<false> value is returned. It is up to the user to call
+C<reset> if they so desire.
+
+The C<recipient> method can also pass additional case-sensitive OPTIONS as an
+anonymous hash using key and value pairs. Possible options are:
+
+ Notify => ['NEVER'] or ['SUCCESS','FAILURE','DELAY'] (see below)
+ ORcpt => <ORCPT>
+ SkipBad => 1 (to ignore bad addresses)
+
+If C<SkipBad> is true the C<recipient> will not return an error when a bad
+address is encountered and it will return an array of addresses that did
+succeed.
+
+ $smtp->recipient($recipient1,$recipient2); # Good
+ $smtp->recipient($recipient1,$recipient2, { SkipBad => 1 }); # Good
+ $smtp->recipient($recipient1,$recipient2, { Notify => ['FAILURE','DELAY'], SkipBad => 1 }); # Good
+ @goodrecips=$smtp->recipient(@recipients, { Notify => ['FAILURE'], SkipBad => 1 }); # Good
+ $smtp->recipient("$recipient,$recipient2"); # BAD
+
+Notify is used to request Delivery Status Notifications (DSNs), but your
+SMTP/ESMTP service may not respect this request depending upon its version and
+your site's SMTP configuration.
+
+Leaving out the Notify option usually defaults an SMTP service to its default
+behavior equivalent to ['FAILURE'] notifications only, but again this may be
+dependent upon your site's SMTP configuration.
+
+The NEVER keyword must appear by itself if used within the Notify option and "requests
+that a DSN not be returned to the sender under any conditions."
+
+ {Notify => ['NEVER']}
+
+ $smtp->recipient(@recipients, { Notify => ['NEVER'], SkipBad => 1 }); # Good
+
+You may use any combination of these three values 'SUCCESS','FAILURE','DELAY' in
+the anonymous array reference as defined by RFC3461 (see http://rfc.net/rfc3461.html
+for more information. Note: quotations in this topic from same.).
+
+A Notify parameter of 'SUCCESS' or 'FAILURE' "requests that a DSN be issued on
+successful delivery or delivery failure, respectively."
+
+A Notify parameter of 'DELAY' "indicates the sender's willingness to receive
+delayed DSNs. Delayed DSNs may be issued if delivery of a message has been
+delayed for an unusual amount of time (as determined by the Message Transfer
+Agent (MTA) at which the message is delayed), but the final delivery status
+(whether successful or failure) cannot be determined. The absence of the DELAY
+keyword in a NOTIFY parameter requests that a "delayed" DSN NOT be issued under
+any conditions."
+
+ {Notify => ['SUCCESS','FAILURE','DELAY']}
+
+ $smtp->recipient(@recipients, { Notify => ['FAILURE','DELAY'], SkipBad => 1 }); # Good
+
+ORcpt is also part of the SMTP DSN extension according to RFC3461.
+It is used to pass along the original recipient that the mail was first
+sent to. The machine that generates a DSN will use this address to inform
+the sender, because he can't know if recipients get rewritten by mail servers.
+It is expected to be in a format as required by RFC3461, xtext-encoded.
+
+=item to ( ADDRESS [, ADDRESS [...]] )
+
+=item cc ( ADDRESS [, ADDRESS [...]] )
+
+=item bcc ( ADDRESS [, ADDRESS [...]] )
+
+Synonyms for C<recipient>.
+
+=item data ( [ DATA ] )
+
+Initiate the sending of the data from the current message.
+
+C<DATA> may be a reference to a list or a list. If specified the contents
+of C<DATA> and a termination string C<".\r\n"> is sent to the server. And the
+result will be true if the data was accepted.
+
+If C<DATA> is not specified then the result will indicate that the server
+wishes the data to be sent. The data must then be sent using the C<datasend>
+and C<dataend> methods described in L<Net::Cmd>.
+
+=item expand ( ADDRESS )
+
+Request the server to expand the given address Returns an array
+which contains the text read from the server.
+
+=item verify ( ADDRESS )
+
+Verify that C<ADDRESS> is a legitimate mailing address.
+
+Most sites usually disable this feature in their SMTP service configuration.
+Use "Debug => 1" option under new() to see if disabled.
+
+=item help ( [ $subject ] )
+
+Request help text from the server. Returns the text or undef upon failure
+
+=item quit ()
+
+Send the QUIT command to the remote SMTP server and close the socket connection.
+
+=back
+
+=head1 ADDRESSES
+
+Net::SMTP attempts to DWIM with addresses that are passed. For
+example an application might extract The From: line from an email
+and pass that to mail(). While this may work, it is not recommended.
+The application should really use a module like L<Mail::Address>
+to extract the mail address and pass that.
+
+If C<ExactAddresses> is passed to the constructor, then addresses
+should be a valid rfc2821-quoted address, although Net::SMTP will
+accept accept the address surrounded by angle brackets.
+
+ funny user@domain WRONG
+ "funny user"@domain RIGHT, recommended
+ <"funny user"@domain> OK
+
+=head1 SEE ALSO
+
+L<Net::Cmd>
+
+=head1 AUTHOR
+
+Graham Barr <gbarr@pobox.com>
+
+=head1 COPYRIGHT
+
+Copyright (c) 1995-2004 Graham Barr. All rights reserved.
+This program is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself.
+
+=cut