diff --git a/send-mass.plx b/send-mass.plx
index df88de2..591db8a 100755
--- a/send-mass.plx
+++ b/send-mass.plx
@@ -1,5 +1,20 @@
 #!/usr/bin/perl
 # send-mass.plx                                               -*- Perl -*-
+#
+# This program's license gives you software freedom; you can copy, modify,
+# convey, and/or redistribute it under the terms of the GNU General Public
+# License as published by the Free Software Foundation; either version 3 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program in a file called 'GPLv3'.  If not, write to the:
+#    Free Software Foundation, Inc., 51 Franklin St, Fifth Floor
+#                                    Boston, MA 02110-1301, USA.
 
 use strict;
 use warnings;