SAP TM, Subcontracting email to the carrier has wrong "Sender" email address. How to change "Sender"

I would similar to cognize however the sender of an email to the bearer is decided? Currently, we spot that the sender code is the email code of the idiosyncratic that triggered the "Send to Carrier" action. How is this email code of the idiosyncratic decided, is it taken from SU01 idiosyncratic data?

We would similar to alteration the sender email automatically depending connected shipping constituent oregon purchasing organization. This is required due to the fact that we usage a batch-job for sending retired emails to carriers.

Thanks.

Kaya