I would settle for a tag in the subject line like "[checkbutton]" or similar so I know to ignore those emails. They mix in with legitimate page updates and make it hard to tell the difference without scouring the redlines. 

Workaround for Confluence 7.x
the disabling of modules requires an API call and is no longer possible via the Add-Ons panel from the Admin page. (Reference: https://confluence.atlassian.com/confkb/cannot-enable-or-disable-bundled-system-apps-or-modules-1035241968.html )
The suggested resolution from the linked page, is to use curl for disabling the module. This is the command, I successfully tested on confluence 7.13.0:

curl --user "<USERNAME>:<PASSWORD>" --location --request PUT '<BASE_URL>/rest/plugins/1.0/com.atlassian.confluence.plugins.confluence-inline-tasks-key/modules/tasks-notification-key' \
--header 'Content-Type: application/vnd.atl.plugins.plugin.module+json' \
--data-raw '{
    "enabled": false
}' 

We're using tasks for a sort of checklist for some of our development activities. Switching off notification for checking/unchecking task boxes will help to avoid tones of unnecessary email notifications. Some people still want to watch the changes in page's content, but notifications for each checkbox changes are too irritating.

The feature will be very useful. Highly recommend to consider the option. 

I get the same problem – people in our organisation are getting frustrated by the notifications, when tasks are marked as completed. Be great if we could just disable the notifications on tasks & limit them to when we edit pages.

Tasks are a great feature, but the email noise causes a lot of confusion

I ran into this on v 6.8.2, maybe including Tasks in the batch notifications job "Send Batched Notifications" would be a good way to solve it? At least Admins could decide on the length of time that works best for our organizations.

Behavior on Confluence 6.6.5 when editing inline tasks in the view page mode:

• When a task is marked as completed, it triggers a notification saying the page was modified.
• When a task is marked back as incomplete, a notification is sent saying the page was modified.

Both notifications are confusing, since it doesn't show what exactly changed.

The quantity of emails created here is huge, every space watcher gets a seperate email for every task change as this runs whilst page is not in edit mode.

Task notification should be handled differently to other changes. Email should be customized to report task completion.

Our users use Confluence Tasks to keep track of smaller tasks that don't become JIRA issues , which are grouped on team pages.

For each check/uncheck of a task all the team members receive an (unwanted) e-mail, which really adds up after a while.

A team leader on the other hand would like to be notified of each task change.

As such an option in a users profile to turn on/off mail notification for tasks would be greatly appreciated

Hello everybody, it should be also possible to switch off notifcations for tasks generally. The users are usually looking directly under their task section..