By default, no email is sent when a user is assigned to / mentioned in a checklist item. Email notifications might be enabled as described below. |
Enabling email notifications is a Pro feature (not available in Issue Checklist Free). Read more |
For email notifications to be sent, the Jira administrator has to explicitly enable the corresponding option in Jira settings > Apps > Issue Checklist > Global Settings.
Issue Checklist doesn't read email addresses to send notification. User account ID (cryptic value) is used to send emails through Atlassian API. |
Email notification is sent when a single user or users are mentioned:
Email notifications are not sent if the user was mentioned while the checklist was edited in the editor or through the custom field. |
It's currently not possible for a single user to unsubscribe from receiving email notifications when he/she is mentioned. Instead, Jira administrator can disable email notifications globally.
Let us know if you need per project or per user subscribe/unsubscribe option.