Is imitation through phone calls or e-mail Islamically acceptable, taking into consideration the possibility of these means being hacked?

It is permissible for appointments to be made and positions to be held through modern communication methods, provided that the intended purpose is achieved and there is no ambiguity or fraud. This is because the holding of positions through written correspondence or verbal communication falls under the category of means. Therefore, any permissible means that achieves the intended purpose is permissible. As for the possibility of forgery or falsification, this matter is referred to the general rules of evidence.