Send Reminders to owners of open issues
In roundups distribution in the scripts directory there is an example of a reminder script roundup-reminder that sends emails about open issues to users.
If you want more, e.g., send open issues to nosy users, add additional email addresses to report all open issues etc, see the following script. The script is based on the asumption that your tracker contains a deadline date property and looks up all issues up to the given date. You may want to customize the call to db.issue.filter and the setting of 'format' for your tracker.
The script by default outputs what it would send to standard output. Only with the --send option email is sent. This allows for checking what would be sent before actually sending lots of emails to lots of users. Other optios allow limiting the users to whom emails are sent, including users on the nosy list of issues in the report, or select other users to report (all selected issues) to. Just call the script with argument --help to find out more.
For download of the script, see duedate.py