Mask sender for Pending Worker emails

Summary:

Hi all,

I need support on this theme: when a mail is sent to a pending worker from Oracle, for example for the Preboarding task allocation, the email sender has to be masked. This because it seems an spam, the sender is: etjb.fa.sender@workflow.mail.em2.cloud.oracle.com.

We had already masked the sender for internal emails (worklist>administrators>Email "From:" Display Name) and for external candidates (Enterprise Recruiting and Candidate Experience Information>Corporate Branding>Vanity Email -> see screenshot attached) but it is not working for emails to pending workers. Do you have any idea on how to solve this issue?