The “From” part is configurable per specification, it’s called identities. Good email clients will have config options for that.
But there’s an extra part that the server needs to provide so that Google doesn’t think you’re doing something “nefarious” (read: using email as it’s intended to be used but not as Google wants it to be used).
Properly set up, it’s more than a vanity project - it’s an eternal email address.
Because, properly set up, you can also send mail from that address (or at least that’s how it appears to recipients).
Another email provider fucks you over? NP, just point your redirecting address somewhere else.
As someone who’s been using a similar service for over a decade, the end user and both providers need to set the thing up properly. Thankfully mine is dedicated.
So, you should check with linux.com (?) how serious they are about it (edit: according to the screenshot above, not very), if you want to use this seriously.
These I unsubscribe from.
That said, you have a point and I’m checking out @lemmeatem@lemmy.ml’s links now.