Not receving e-mail after setting up timer event in escalation

Hi, I have set up timer event  in the escalations tab and selected Send Alert in what action to be taken section ? and gave my e-mail address, it's not working.

Tried Send e-mail smart service, i can receive e-mail with this smart service, ONLY change i made is changed Timezone in process model properties to IST, which is my time zone, any help is much appreciated.

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