Add contract to mass.mailing
CHANGELOG:
### FIXED
- [#744](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/744) Add contract to mass.mailing
Edited by Pelayo García
CHANGELOG:
### FIXED
- [#744](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/744) Add contract to mass.mailing