I have a domain such as "mktg.companyname.com" which is the authenticated domain submitted as part of SAP. The from name would be something like "Company Name". This is the domain that emails send from. Now, in the event of a dynamic sender profile, where we can basically override the "From Name" and "From Email" via AMPScript, and we want to put something like "John Doe" as the From Name and "firstname.lastname@example.org" as the From Email, this wouldn't have a negative impact on deliverability, would it? Would the email still technically be sending from "mktg.companyname.com", but the subscriber would just see "John Doe" / "email@example.com" in the email address and from name in their inbox?
Can we override the From Email Address to display something like firstname.lastname@example.org and it not have any negative impact on deliverability? Or does it NEED to have the authenticated domain as part of the sender's email address?