Integrate your email systems with Google mail or MS mail. You'll quickly find that they do not accept bcrypt. Plain md5 or plain sha1 is all they support (at le

Integrate your email systems with Google mail or MS mail. You'll quickly find that they do not accept bcrypt. Plain md5 or plain sha1 is all they support (at least that was the case two years ago). When you are forced to inter-operate with the big guys, you'll find not many actual use bcrypt.