I found the solution:

1) Create bounce@mydomain.com in my mail server.

2) In ‪addons\mail\models\mail_mail.py, function send:

                # headers
                headers = {}
                bounce_alias = self.env['ir.config_parameter'].get_param("mail.bounce.alias")
                catchall_domain = self.env['ir.config_parameter'].get_param("mail.catchall.domain")
                if bounce_alias and catchall_domain:
                    if mail.model and mail.res_id:
                        headers['Return-Path'] = '%s-%d-%s-%d@%s' % (bounce_alias, mail.id, mail.model, mail.res_id, catchall_domain)
                        
                    else:
                        headers['Return-Path'] = '%s-%d@%s' % (bounce_alias, mail.id, catchall_domain)
                        
                if mail.headers:
                    try:
                        headers.update(eval(mail.headers))
                    except Exception:
                        pass

Where is your email hosted? And can you share the config you are using?

I think these should help the community with providing an answer to you.