Mass Mailing Subscription Email

This module adds automatic notification emails to mailing lists. On each mailing list you can now choose a "Subscribe Notification" and an "Unsubscribe Notification" email template; these two fields appear on the mailing list form and (optionally) in the list view. Two ready-made templates are provided: "Mailing list: Subscribed" and "Mailing list: Unsubscribed".

When a contact is added to a list, or when an existing subscription is changed to unsubscribed, or when a subscription is deleted, Odoo sends the matching email to the contact automatically. If the template field is left empty, no email is sent for that list. The sending can also be skipped by other processes through a context flag.

The subscription email contains an unsubscribe link. That link is protected by a security token so only the person who received the email can use it; opening it marks the subscription as opted out and shows the standard "unsubscribed" page. The link is built from the contact's email address and the subscription record.

Existing mailing lists are updated when the module is installed so they use the two new templates by default. The module works on the mailing list, subscription and outgoing email models, and adds a public web route for unsubscribing.