That's your problem right there. The general population has no way of knowing this, you do, but that's only because of your professional background.
So, for lay people there is absolutely no way and that's the vast majority of them, for us internet techies there are ways but they are moderately involved and too impractical for everyday use. And even then, you've established that you will send your email through google, what are you going to do now? Ah yes, send it anyway.
That's your problem right there. The general population has no way of knowing this, you do, but that's only because of your professional background.
So, for lay people there is absolutely no way and that's the vast majority of them, for us internet techies there are ways but they are moderately involved and too impractical for everyday use. And even then, you've established that you will send your email through google, what are you going to do now? Ah yes, send it anyway.