Fix allow_mail_archived_partner causing system notifications to send emails

allow_mail_archived_partner/models/account_move_send.py

@@ -0,0 +1,14 @@
+from odoo import models, api
+
+
+class AccountMoveSend(models.TransientModel):
+    _inherit = "account.move.send"
+
+    @api.model
+    def _get_default_mail_partner_ids(self, move, mail_template, mail_lang):
+        """
+        The invoice 'Send by Email' wizard uses this to compute partner_ids (To:).
+        We must disable active_test here to include archived partners.
+        """
+        wiz = self.with_context(active_test=False, include_archived_partners=True)
+        return super(AccountMoveSend, wiz)._get_default_mail_partner_ids(move, mail_template, mail_lang)