Email is a deeply abused system.
From viruses to spam to identity theft.
Our way of beating this is to use Google.
To send and receive emails with your domain name you will need at least 1 Google gSuite account.
These cost $65US/Year/eMail address.
They provide 35GB of backup for your computer.
And give you access to to Googles replacement to Microsoft Office, all online, always available on all your devices.
Installation to all your devices, $65.00 (up to three devices, Computer, Phone, Tablet)