When a bounce has to be managed on a record already inheriting from blacklist mixin it shoudl not be counted two times: one for email-based bounce and one for "all records using that email linked to blacklist mechanism should bounce". A mechanism exists to prevent that double increase but it was not correctly done. Protection was reset in a loop. Task ID-2547347 PR odoo/odoo#72347 closes odoo/odoo#72420 X-original-commit: 6e1bca5df19392d384d7c398b7aea66b62381938 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>