Agreed (although "tho'", with apostrophe, is slightly archaic poetic usage). My point was more that whereas "u" for "you" is more or less SMS-speak in America, it actually seems to be no more informal than "info" or "gonna" in Indian usage. He's still far off from the right language register, but he's perhaps less far off in Indian usage than in American usage.

I actually don't mind slightly informal business correspondence -- I think a lot of business letters are too stodgily written.