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-rw-r--r--lisp/mail/sendmail.el3
1 files changed, 2 insertions, 1 deletions
diff --git a/lisp/mail/sendmail.el b/lisp/mail/sendmail.el
index 5667aa85ff1..73f99263da2 100644
--- a/lisp/mail/sendmail.el
+++ b/lisp/mail/sendmail.el
@@ -810,7 +810,8 @@ the user from the mailer."
'(lambda (e)
(unless (member e l)
(push e l)))
- (split-string new-header-values ", +" t))
+ (split-string new-header-values
+ ",[[:space:]]+" t))
(mapconcat 'identity l ", "))
"\n"))
;; Add Mail-Reply-To if none yet