Every extension which uses the Joomla! scheduled tasks feature can send notification e-mails, if the task was successfull or not. The used text is defined by the Joomla! scheduled tasks and can't be changed by the extension as of today.
But you can use the Joomla! language overrides to customize the e-mail subject and text of your scheduled tasks. This can be helpfull, if you maintain multiple websites and want to know form which website the e-mail is coming from.
A good explanation is located in the Joomla! documentation for language overrides
The used constants for the subject of the scheduled task e-mail are:
- PLG_SYSTEM_TASK_NOTIFICATION_FAILURE_MAIL_SUBJECT
- PLG_SYSTEM_TASK_NOTIFICATION_FATAL_MAIL_SUBJECT
- PLG_SYSTEM_TASK_NOTIFICATION_ORPHAN_MAIL_SUBJECT
- PLG_SYSTEM_TASK_NOTIFICATION_SUCCESS_MAIL_SUBJECT
