Mail No user Assign Notification

This module gives you a way to stop Odoo from automatically subscribing a user to a record when that user is assigned to it. Normally, when a user is set as the responsible person on a record, Odoo adds them as a follower and they start receiving notifications. With this module, you can choose which types of records should skip that automatic subscription.

The setting is stored as a system parameter named mail_no_user_assign_notification.models. You enter a comma-separated list of the technical model names (for example, the internal names of the record types you want to exclude). When a record of one of those types is created or updated with a responsible user, the module removes the user assignment from the automatic subscription process, so no follower subscription and no assignment notification is generated for that user.

The module changes the behaviour of the mail.thread model, which is the base used by many Odoo records for messages, followers and notifications. It does not add any new menu, screen or button; the only configuration is the system parameter, which is created empty when the module is installed. The change applies both when records are created and when the responsible user is changed later.