[dvfjsdhgfv]

It really depends on the person. I was once working in a an almost exclusively female envirinment and it wasn't rare to receive these "Hey, Ladies" e-mails, especially when the person replying didn't bother to check the guge Cc: list for the existence of the only male employee.

What did I feel then? Amusement. I'd sometimes reply in jest something about "just our girly things" and the author usually apologized "oh I'm sorry, I didn't notice you on Cc:" which was even more amusing since I didn't really feel there's anything to apologize for.