Legal email addresses for InternetAddress

I thought that the line below should throw an exception on *all* illegal
email addresses:

// this does not throw an exception
new InternetAddress("ab#surelynotavalidemailaddress##!!!!cdef");

// this does throw an exception
new InternetAddress("@asdf");
new InternetAddress("asdf@");


(From the traffic in the archives it appears that the classpathx-javamail list is
more or less dormant, hence this crosspost.)

Øyvind