Can e-mail replace traditional letters?

Personally, I think it is more difficult, but you can demonstrate it from the aspects of family, legal effect and current national quality. It may be useful to admit that it can replace part of the letter at an appropriate time, give the other party a blow, disrupt the other party's steps and block the other party's possible arguments. In fact, the biggest advantage of e-mail is that it is fast and cheap, so be careful not to let the other party bypass this place. It's really hard to win, but it should be a good way to disturb him.