Not true. This is not how it works. look up "Trump.org". This guy got sued by Trump Inc for trademark infringement, and won (Trump inc didn't pushed the lawsuite tho), this means you can use domains of other companies if you do not intend to use it for malware, or confuse customers/try to make profit from it, from what i've read.
But, i am not sure if domains such as gmaio.com are allowed. Anyone knows?