As far as I know Samsung isn't a Korean family name, it's just a brand.
That said, are you sure it wasn't the + that caused the problem? I've run into that a few times, presumably when someone tried to roll their own email validation.
That said, are you sure it wasn't the + that caused the problem? I've run into that a few times, presumably when someone tried to roll their own email validation.
gnusmas@private-domain.tld worked just fine..