email notification possible related to due date ?

[Nic Brough -Adaptavist-]

We'll need more detail for a thorough answer, but to get started with.

Create a filter that searches for the issues you want (e.g. "unresolved and due date in the next 7 days"), save it, and subscribe to it.  It will email you regularly with the list.

[kishore kr]

I am looking for option "send an email reminder automatically to current assignee of the ticket, when due date is approaching".

how long before the due date to be configurable.

[Nic Brough -Adaptavist-]

Ok, you'll need some form of escalation script for this.  Most of the approaches use the same filter idea I gave you above, but with escalation, you should transition or comment on the issue (both of those can fire an event you can use in the notification scheme and send to "assignee")