3

I'm trying to implement an access check (a 'do-not-send' list query) just before emails are sent. I see how to modify the message, but how do I stop a message?.

HOOK_mail ($key, &$message, $params) {
   if (TRUE) {
      // -- Stop Message From Being Sent Here -- //
   }
}

Is break; adequate?

6

You can do the access check from hook_mail_alter instead of hook_mail (let it prepare the default message based on parameters, and alter it later) by something like:

function HOOK_mail_alter(&$message) {
  // can add additional check for particular mails here,
  // by checking the value in $message['id']
  if (TRUE) {
    $message['send'] = FALSE;
  }
}

Note: You should clear the cache in order to make the changes effective.

  • 3
    In case someone is wondering, this still works for Drupal 8. – Gnuget Jan 12 '17 at 21:32

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