social/mail_tracking_mass_mailing/models/mail_mail.py

# Copyright 2016 Antonio Espinosa - <antonio.espinosa@tecnativa.com>
# Copyright 2017 Vicent Cubells - <vicent.cubells@tecnativa.com>
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

from odoo import models, api


class MailMail(models.Model):
    _inherit = "mail.mail"

    @api.model
    def _tracking_email_prepare(self, partner, email):
        res = super(MailMail, self)._tracking_email_prepare(partner, email)
        res['mail_id_int'] = self.id
        res['mass_mailing_id'] = self.mailing_id.id
        res['mail_stats_id'] = self.statistics_ids[:1].id \
            if self.statistics_ids else False
        return res

    @api.model
    def _get_tracking_url(self):
        # Invalid this tracking image, we have other to do the same
        return False