That makes more sense anyway. Why should your individual identity be hardwired to your current location or department? If you changed jobs within the company you had to get a new email address and login?
Why should your individual identity be hardwired to your current location or department?
When you have a workforce the size of IBM it makes sense.
At my last company, with about 300 workers, we had three people with the same first name and last name. Two had the same middle initials.
At my current company, pre-pandemic, even though my department was only 50 people, we still had two with the same first, middle, and last names. They ended up being "1" and "2" in their e-mail addresses.
If your company has a large number of first, second, or third-generation immigrants from Central or South America in it, you run into name collisions all the time.
A company I worked for did that. Not really for geo-location reasons, but brand ones. People that worked for foobar got a @foobar address, and barfoo people got @barfoo. It was all owned by the same company, but the companies that got bought up kept their brands alive, and this was part of it.
I bounced around divisions, so I kept getting new logins. The old emails would forward to the new ones, but the logins would be sunsetted out as I no longer needed access to old projects. I actually don't know how the backend works, other than every time I need some permissions or something fixed, invariable the IT people get very confused by the mess, whatever it is.
My guess would be that's just their login, but their email would not have their location sub-domain (I've never seen a sub-domain in e-mail, well actually not true, people with domain + country TLDs all have it, e.g. clarkson@bbc.co.uk).
Of course moving locations/departments would mean getting a new login which is all sorts of problematic.
There’s no reason to do that, though. You can set your MX record to whatever you want for your domain. Why would you set yourself up to have to change your email? Not to mention advertising that your email is on a raspberry pi. Somebody will probably come along and DDOS that thing just for fun.