[Koha] Not able to send email alerts

[Sahadeo Taware]

Dear Friends


We are using koha for our library (version 16.11) on ubuntu 14.04

I am using postfix for sending email alerts to our user

previously it was work very well but now the email alerts not able to send.

I have check all settings but not able to solve the query


The notices showing pending status in patron detail


Kindly check the Screenshot


-- 
Sahadeo D. Taware
Librarian, M.L.I.Sc., NET
Thakur College of Science and Commerce
Thakur Village, Kandivli(E), Mumbai 400101
Mob. No 9324912816
Office 28870627 Extn. 126