Thanks for all your reply mails. I have not installed zebra out of time limit constraint, i added the marc records.(thanks to Mr.krishnan) with different book formats, which asks for limited entries. Many thanks to vimal , resolved my doubts. I had launched the app, woking on it. Mails are not sent on checkout,checkin,hold filed. 1.I have created the patron. and login as opac user UI , now selected Mymessaging menu and checked Email checkbox against ItemDue,ItemCheckout,HoldFilled,Item Checkin,Advance notice. When I login in the staff client UI, and check out /checkin a specific book for the patron i have created and enabled the email checkbox. Mail is not delivered. won't it be triggered at once . Is there any configuration i need to add. Admin - Tools - Menu There is only Rules for Rules for overdue actions: