Email Notification

Users are not getting the Jenkins email notifications when they are rebuilding the existing build which is triggered by others.

Let say Build 289 triggered by “User A”, now “User B" build 290 which is a rebuild of 289.

In above case User B is not getting Jenkins email notifications for his build 290 execution.

im getting below error can someone please help me
however my test mail is work but through the job its not work
Email was triggered for: Always
Sending email for trigger: Always
An attempt to send an e-mail to empty list of recipients, ignored.
Finished: SUCCESS

@yugendar42 Does both the users are in the recipient list of Email notification… Can you please check with that and also check that both the users have the necessary permissions to trigger and rebuild