No security concerns.
box.example.com is normally how MIAB is usually setup because example.com will host a website, where box.example.com will host the mail, cloud, and webmail client.
But there is nothing stopping you from using just example.com
No security concerns.
box.example.com is normally how MIAB is usually setup because example.com will host a website, where box.example.com will host the mail, cloud, and webmail client.
But there is nothing stopping you from using just example.com