Sender email address inbox setup for SAP Mobile serivces in Hybris Marketing Cloud

Hi Experts,

While using SAP Mobile Services for email/sms in Hybris Marketing Cloud - do we need to setup send email address inbox or not necessary ?

My understanding is that sender email address inbox is not required rather valid sender email address setup is enough to receive notifications back to Hybris Marketing system.

Could you please let me know if anyone has inputs on this.

Thanks and regards,

Dinesh.