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MDL-67772 mod_forum: Fix email threading for first message

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Brendan Heywood 2020-02-19 00:27:12 +11:00
parent f30110b5eb
commit cc0d2d4630
1 changed files with 5 additions and 0 deletions
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5
mod/forum/classes/task/send_user_notifications.php
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@ -485,6 +485,11 @@ class send_user_notifications extends \core\task\adhoc_task {
} else {
$headers[] = "References: $parentid";
}
} else {
// If the message IDs that Moodle creates are overwritten then referencing these
// IDs here will enable then to still thread correctly with the first email.
$headers[] = "In-Reply-To: $rootid";
$headers[] = "References: $rootid";
}
// MS Outlook / Office uses poorly documented and non standard headers, including