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diff --git a/plugins/01checksigsep b/plugins/01checksigsep
new file mode 100644
index 0000000..fb70cff
--- /dev/null
+++ b/plugins/01checksigsep
@@ -0,0 +1,41 @@
+#!/usr/bin/perl -w
+
+# Copyright (C) 2000-2003 Simon Huggins
+# checksigsep checks for an existing sigsep and allows you to quit without
+# adding a new sig.
+
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 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; if not, write to the Free Software Foundation, Inc., 59
+# Temple Place, Suite 330, Boston, MA 02111-1307  USA
+
+use strict;
+
+return if ($cfg{'msgfile'} eq "-");
+
+my $msg="";
+open(MSG, "<$cfg{'msgfile'}") or return;
+while(<MSG>) {
+	$msg .= $_;
+}
+close(MSG);
+if (grep { /\n-- \n/ } $msg) {
+	my $oldmsg = $msg;
+	print STDERR "Looks like this message already has an unquoted sigsep:\n";
+	$oldmsg =~ s/.*(-- $)/$1/ms;
+	print STDERR $oldmsg;
+	print STDERR "\n\nAdd another? ([N]o/(y)es)\n";
+	$_ = <STDIN>;
+	return 255	if /^q(?:uit)?$/i;
+	return 255	if /^(?:no?|\n)$/i;
+}
+