How to customize the Address of the sender for candidate emails

Summary:

How to update the sender email from oracle system to candidates. "iaajcs-dev1.fa.sender@workflow.email."

The current sender name will be confusing and the candidates might consider this as spam.

Also, can someone explain the maintenance involved in using vanity emails? How successful is it to use vanity emails? What maintenance is needed? Additionally, are there any issues with using the vanity email functionality?

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