properly anchor Content-class match

diff --git a/procmail/attach-mdn b/procmail/attach-mdn
index 3e9a28ee2518d484fafff0006d312fa4a8a4409a..870cbbaa87ba255050292d30772c17d5232a3c9a 100644 (file)
--- a/procmail/attach-mdn
+++ b/procmail/attach-mdn
@@ -3,7 +3,7 @@
 # this recreates at least the In-Reply-To header, but not the References list.
 # Better than nothing.
 :0
-* ^Content-class: urn:content-classes:mdn
+* ^Content-class: urn:content-classes:mdn$
 * !^In-Reply-To:
 *$ B ?? ^Original-Message-ID:$RE_EXTRACT_HEADER_VALUE
 {