Raley notification can send JIRA issue attachments via email or Slack message.
Approve and Decline tickets via email
Add Approve and Decline buttons to your notification on Service Request with Approvals ticket. Approvals would be able to approve or decline the request simply by pressing a button in the email. More information about this feature you can find here
Raley Notification can store all copies of the notifications sent out for later audit in issue comments.