5.1.7 Email etiquette: Correct communication via e-mail

e-mails should only be used for simple matters.
For more complex tasks, additional explanations should be given by telephone.
choose a meaningful and topic-related subject line.
always write e-mails briefly and to the point. Explain what you expect from the recipient and by when these expectations should be fulfilled.
since many people sort their emails by projects or tasks in the inbox, you should write a separate email for each topic. This makes it easier to find the mails later on.
E-mails are also business letters and should be written formally.
Exceptions apply only in the case of very personal contact.
avoid long CC lists. This looks unprofessional and often unnecessarily clutters up mailboxes.