1 files changed, 0 insertions, 2 deletions

diff --git a/lisp/mail/mail-extr.el b/lisp/mail/mail-extr.el
index 6b0ba81cb9e..85700097f1c 100644
--- a/lisp/mail/mail-extr.el
+++ b/lisp/mail/mail-extr.el
@@ -1174,8 +1174,6 @@ If ADDRESS contains more than one RFC-822 address, only the first is
              (setq %-pos (cdr %-pos))))
 
       (setq %-pos (nreverse %-pos))
-      ;; RFC 1034 doesn't approve of this, oh well:
-      (downcase-region (or (car %-pos) @-pos (point-max)) (point-max))
       (cond (%-pos                      ; implies @-pos valid
              (setq temp %-pos)
              (catch 'truncated