It is incredibly frustrating composing or replying to emails on my iPhone 6s. After a certain amount of text, every time you want re-read the email and want to amend some text that appears after that point, it is impossible because the iPhone keyboard pops up, and airmail bring you all the way back to the beginning of your message. My suggestion is to have the option of minimising the keyboard at all times and to allow tap and touch that would not activate the keyboard, but will only do so if you chose to, and will start from the point you tapped and touched the email.