1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/mail/sendmail.el b/lisp/mail/sendmail.el
index 00107a004cb..a7a65302efd 100644
--- a/lisp/mail/sendmail.el
+++ b/lisp/mail/sendmail.el
@@ -376,7 +376,7 @@ actually occur.")
                (beginning-of-line) (end-of-line)
                (2 font-lock-constant-face nil t)
                (4 font-lock-comment-face nil t)))
-            '("^\\(X-[A-Za-z0-9-]+\\|In-reply-to\\):.*"
+            '("^\\(X-[A-Za-z0-9-]+\\|In-reply-to\\):.*\\(\n[ \t]+.*\\)*$"
               . font-lock-string-face))))
   "Additional expressions to highlight in Mail mode.")