Index: tools/hook-scripts/mailer/mailer.py
===================================================================
--- tools/hook-scripts/mailer/mailer.py	(revision 7936)
+++ tools/hook-scripts/mailer/mailer.py	(working copy)
@@ -164,7 +164,7 @@
            'To: %s\n'      \
            'Subject: %s\n' \
            'MIME-Version: 1.0\n' \
-           'Content-Type: text/plain; charset=utf8\n' \
+           'Content-Type: text/plain; charset=UTF-8\n' \
            % (self.from_addr, self.to_addr, subject)
     if self.reply_to:
       hdrs = '%sReply-To: %s\n' % (hdrs, self.reply_to)