I can tell you many others situation which e-mail is not the best means for communicating with your team players, but these are the practices that you have to avoid using e-mail at the workplace as supervisor:
1. Don’t use e-mails to give bad news or fire an employee.
Remember that this channel doesn’t have the communicational advantages of body language, facial expression or tone of voice.
Employees feel more respected when bad news are given in person.
Face-to-face meetings give employees the chance to ask questions, “digest” information better, and identify their options.
2. Don't use e-mail to discuss the performance of an employee with other managers.
It is a matter of simple professional courtesy, and there is no risk that the information will become public.
The best way to have these kind of conversations is in personal, closed-door meetings, or through a telephone call.
Written negative comments about an employee can later be used against the manager to erode team spirit and the feeling of identity with the company.
3. Don't minimize face-to-face contact in your daily work.
E-mail is a fantastic resource that allows us to save a lot of time, and although some work mates feel fine with having almost all communication electronically, many others feel devalued if they don't also receive personal attention.
E-mail must not replace the personal contact between supervisors and supervised.
Even in the Internet age, nurturing healthy human relations is still an essential skill for the success of all types of businesses.