Replying to [heshelleyatgmaildotcom]:
opalcutter's right. I wouldn't use it especially among strangers. I used to get these kind of junk emails with too frequent "brother" salutations from Nigerian scammers.
It also doesn't sound professional in business circle. It sounds weird and pretentious. Even my real brother and sister don't send me email calling me "brother".. because that goes without saying, it's something that resides inside us emotionally.
I'd rather people just say "Hi!" or "Hello" (if they wish to be informal) as that's still acceptable, at least to me.