Add option to control headers for sender and return-path

I have configured several different sender addresses for my account in Outlook with KOFF. If I now send emails with support@foo.com via my myname@foo.com account, the return path and the sender are set to myname@foo.com in the email header.

As a rule, however, I don't want it to be obvious that the email was sent from myname@foo.com. Error reports for the mail should also be sent to support@foo.com and not just to myname@foo.com.
Essentially, I would like to be able to adjust this for data protection reasons so that external parties do not gain knowledge of internal e-mail accounts.