diff --git a/Webperl/Message/Queue.pm b/Webperl/Message/Queue.pm
index 73a0475..3322826 100644
--- a/Webperl/Message/Queue.pm
+++ b/Webperl/Message/Queue.pm
@@ -140,7 +140,7 @@ sub queue_message {
             # unacceptable delays if there are a lot of recipients and slow transports involved.
             # That doesn't matter with the queue dispatcher, as that will normally be called from
             # a cron job in the background, but this will happen during normal program flow.
-            $self -> deliver_message($msgid)
+            $self -> deliver_message($msgid, $args -> {"force_all_transports"})
                 if($args -> {"send_immediately"});
         }
 
@@ -156,7 +156,7 @@ sub queue_message {
 
         $self -> {"logger"} -> log("messaging", 0, undef, "Queued message $msgid with recipients ".join(",", @{$args -> {"recipients"}}));
 
-        $self -> deliver_message($msgid)
+        $self -> deliver_message($msgid, $args -> {"force_all_transports"})
             if($args -> {"send_immediately"});
     }
 
@@ -421,17 +421,20 @@ sub deliver_queue {
 }
 
 
-## @method $ deliver_message($messageid)
+## @method $ deliver_message($messageid, $force_all)
 # Given a message ID, attempt to send the message via all available transports.
 # This forces immediate delivery of the specified message, if possible, and
 # marks it as either sent or failed.
 #
 # @param messageid The ID of the message to send.
+# @param force_all Force the message to be sent over all available transports, even if
+#                  the user has disabled one.
 # @return The number of transport send failures (0 indicates all transports delivered
 #         the message successfully), undef on error.
 sub deliver_message {
     my $self      = shift;
     my $messageid = shift;
+    my $force_all = shift;
 
     $self -> clear_error();
 
@@ -449,7 +452,7 @@ sub deliver_message {
             or return $self -> self_error("Transport loading failed: ".$self -> errstr());
 
         # Tru to send the message through this transport
-        my $sent = $transport -> {"module"} -> deliver($message);
+        my $sent = $transport -> {"module"} -> deliver($message, $force_all);
 
         ++$failures if(!$sent);
 
diff --git a/Webperl/Message/Transport.pm b/Webperl/Message/Transport.pm
index 2443c71..a6df0db 100644
--- a/Webperl/Message/Transport.pm
+++ b/Webperl/Message/Transport.pm
@@ -28,12 +28,13 @@ use base qw(Webperl::Message);
 # ============================================================================
 #  Delivery
 
-## @method $ deliver($message)
+## @method $ deliver($message, $force)
 # Attempt to deliver the specified message to its recipients. This function
 # does not actually do anything in the Message::Transport class - it must
 # be overridden in subclasses to actually perform message delivery.
 #
 # @param message A reference to hash containing the message data.
+# @param force   Send messages via this transport even if the user has disabled it.
 # @return true if the message is sent successfully, undef if not.
 sub deliver {
     my $self    = shift;
diff --git a/Webperl/Message/Transport/Email.pm b/Webperl/Message/Transport/Email.pm
index 200bbd9..31633e4 100644
--- a/Webperl/Message/Transport/Email.pm
+++ b/Webperl/Message/Transport/Email.pm
@@ -102,17 +102,18 @@ sub allow_disable {
 }
 
 
-## @method $ deliver($message)
+## @method $ deliver($message, $force)
 # Attempt to deliver the specified message to its recipients.
 #
 # @param message A reference to hash containing the message data.
+# @param force   Send messages via this transport even if the user has disabled it.
 # @return True on success, undef on failure/error.
 sub deliver {
     my $self    = shift;
     my $message = shift;
+    my $force   = shift;
 
     if(!$self -> {"persist"}) {
-
         eval { $self -> {"smtp"} = Email::Sender::Transport::SMTP -> new($self -> _build_smtp_args()); };
         return $self -> self_error("SMTP Initialisation failed: $@") if($@);
     }
@@ -122,16 +123,16 @@ sub deliver {
     # Work out the the sender if needed...
     if(!$self -> {"force_sender"} && $message -> {"sender"}) {
         $from = $self -> _get_user_email($message -> {"sender"} -> {"sender_id"})
-            or return undef;
+            or return $self -> self_error("Sender email lookup failed: ".$self -> errstr());
     }
 
     # And the recipients
     foreach my $recipient (@{$message -> {"recipients"}}) {
         # Skip users who shouldn't get emails
-        next unless($self -> use_transport($recipient -> {"recipient_id"}));
+        next if(!$force && !$self -> use_transport($recipient -> {"recipient_id"}));
 
         my $recip = $self -> _get_user_email($recipient -> {"recipient_id"})
-            or return undef;
+            or return $self -> self_error("Recipient email lookup failed: ".$self -> errstr());
 
         $to .= "," if($to);
         $to .= $recip;
@@ -146,7 +147,6 @@ sub deliver {
                                       attributes => { charset => 'utf8',
                                                       content_type => "text/plain",
                                                       encoding => 'base64' });
-
     try {
         sendmail($email, { from => $self -> {"env_sender"},
                            transport => $self -> {"smtp"}});
diff --git a/Webperl/Message/Transport/Local.pm b/Webperl/Message/Transport/Local.pm
index 5a64126..60344ce 100644
--- a/Webperl/Message/Transport/Local.pm
+++ b/Webperl/Message/Transport/Local.pm
@@ -28,12 +28,13 @@ use base qw(Webperl::Message::Transport);
 # ============================================================================
 #  Delivery
 
-## @method $ deliver($message)
+## @method $ deliver($message, $force)
 # Attempt to deliver the specified message to its recipients. This function
 # is always successful - it is impossible for local delivery to fail, as the
 # message is already there!
 #
 # @param message A reference to hash containing the message data.
+# @param force   Send messages via this transport even if the user has disabled it.
 # @return Always returns true.
 sub deliver {
     my $self    = shift;