Hello,
I'm HieuHoang, a System Admin.
I have 3-years of experience working with IT-Helpdesk position and Office 365 service.
I think I can help you configure email Office 365, we will email from office 365 and the domain of email from your domain name.
Please consider and contact me, we will discuss all the requirements/problems needed to resolve.
We can remote access via TeamViewer or AnyDesk.
Thank you.