Shy of getting facial surgeries, we're always going to maintain a bit of our old male selves. There are a few other indicators that will ink us to a male past as well such as hands, feet, voice, larynx, among others. And nothing seems more demeaning or delivers a bigger blow to our egos than getting yourself very presentable in female fashion and having another person "out" you.
That said, over time, as you develop an inner confidence to match your outward appearance, it will happen a lot less to the point when it does happen, you actually think they're addressing another person. The most difficult piece in the transitioning is to learn to accept and love yourself as you are. Things like posture, movement, vocalizing, and subtle things like short eye contact, allowing your buttocks to relax while walking, and an overall relaxed demeanor can be worked on to enhance how you present to the world. It does get better and far more easier over time, trust me on that! But other people can tell when you are not sure of yourself, act "afraid" of social interaction, and move about awkwardly and these will always trigger a more discerning glance your way for it signals to others that something is "wrong" about you. So why draw unnecessary attention to yourself by exhibiting less than a positive aura? Which leads me back to self acceptance. Act as if you deserve to be on this planet as much as anyone else and just go about your normal business. It makes others around you more comfortable and will reduce or eliminate those unwanted blows to your person! In time, at the worst, when you do get outed, it will just bounce off of you like it is no big deal. Be proud of who and what you are because it IS no big deal!
Best wishes always...