Hello @Ishwar Chandra,
Welcome to Atlassian Community!
Checking your email address, I saw that there was a block on our side due to the following error:
550: 550 #5.1.0 Address rejected.
I removed this block and you should receive the notifications now.
Please, test again and let us know if you face any issues.
The reset password notification is sent by Atlassian, but something on your mail server blocked the notification.
It's not possible to prevent this issue from happening, but you can whitelist our IPs and domains to make sure everything works as expected:
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