master ec0abf37ee: Make Message check for invalid recipients before sending

[Lars Ingebrigtsen]

branch: master
commit ec0abf37eeb4d8382f8035c78d3bb8c328f5dfa8
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Make Message check for invalid recipients before sending
    
    * lisp/gnus/message.el (message-check-recipients): Check for
    suspicious addresses before sending (bug#51733).
---
 lisp/gnus/message.el | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index 8f11e538c5..1f47e696c3 100644
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -4663,6 +4663,12 @@ This function could be useful in `message-setup-hook'."
                       (format "Email address %s looks invalid; send anyway?"
                               address))
                (user-error "Invalid address %s" address))))
+         ;; Then check for suspicious addresses.
+         (dolist (address (mail-header-parse-addresses addr t))
+           (when-let ((warning (textsec-check address 'email-address-header)))
+             (unless (y-or-n-p
+                      (format "Suspicious address: %s; send anyway?" warning))
+               (user-error "Suspicious address %s" address))))
          ;; Then check for likely-bogus addresses.
          (dolist (bog (message-bogus-recipient-p addr))
            (and bog