First thing you need is some kind of quoting around the email address. Then depending on which quoting system you use you may need to escape the @ character. Perl is mistaking the '@bigcorporation' for an array.
You can try either:
'some.g.guy@bigcorporation.com',
q~some.g.guy@bigcorporation.com~,
q{some.g.guy@bigcorporation.com},
"some.g.guy\@bigcorporation.com",
etc. all of which should work
Hope this helps!