john.doe@gmail.com, John Doe, phillip.maini@gmail.com         | Phillip Maini
John.Doe@gmail.com, John Doe, Phillip.Maini@gmail.com         | Phillip Maini
foo.bar@hotmail.com, foo.bar, gee.whizz@outlook.com           | gee.whizz
foo.bar@hotmail.com, foo.bar, gEe.Whizz@outlook.com           | gEe.Whizz
rodney.dangerfield@comedy.net, comedy, michael.scott@office.0 | office
.jones@x.1, Jones, a.@3.z                                     | A
.jones@x.1, .jones@x.1, a.@3.z                                | a.@3.z
.jones@x.1, .jones, a.@3.z                                    | a.
.jones@x.1, x, a.@3.z                                         | 3
.@b.c, .@b.c, 1@2.3                                           | 1@2.3
john.jones@f.f, John Jones, 1in.thehand@2inthe.bush           | 1in Thehand
chicken.soup@q.z, Chicken Soup, fab@ulou.s                    | Fab
lange@haare.0, lange, fat.so@fat.net                          | fat.so
Lange@haare.0, Lange, fat.so@fat.net                          | {fat.so, Fat So} # either acceptable
chicken@chicken.chicken, chicken, horse@pig.farm              | {horse, pig} # either acceptable