I am struggling to set the sender address when sending a simple email using the Flow's core email action. No matter what I put in the sender address field, the running user's email (my email) appears as the sender.
The core Send Email action doesn't support an arbitrary email address for the sender - the only possible senders are the user running the flow, the default workflow user, or an organization-wide email address.
Sender Type will change the default (the current user, as you're seeing) to one of the other possible sender types. The
Sender Address is only used to specify an org-wide email address.
From the Flow Core Action: Send Email docs:
Sender Address: The organization-wide email address that's used to send the email. Required only if the
Sender Typeis set to
Sender Type: Optional. Email address used as the email's From and Reply-To addresses. Valid values are:
CurrentUser- Email address of the user running the flow (Default)
DefaultWorkflowUser- Email address of the default workflow user
OrgWideEmailAddress- The organization-wide email address that is specified in Sender Address.