Proper email is a balance between politeness and succinctness. Less than five sentences is often abrupt and rude, more than five sentences wastes time, Guy Kawasaki.
Communication is the flow or exchange of information within people or a group of people. It requires a message (what is communicated), a sender (by whom), a recipient (to whom), a channel (through which medium) and a code (in which form). It is very important to adapt your message and communication style to the medium or channel and the receiver. For example, a personal face-to-face conversation with a friend is not the same as writing an email to your boss. It is a completely different beast.
An email is a form of written communication, a method to send messages between computers through the Internet. Email services are not safe, they are completely insecure. Do not send sensitive data or private information in an email, whether written in the body or as an attachment. Best options are Proton Mail (a free ProtonMail account supports 500 MB of email storage), Tutanota, Mailfence (a free Mailfence account provides 500 MB), Posteo, and mailbox.org.
When writing an email consider these ideas:
Cut your message to the bone. Drop every unnecessary word and do not repeat yourself. Use short sentences, simple language, and avoid jargon. Don’t pack too many words and phrases into a single paragraph.
Emails are a very efficient means of communication. They allow us to keep in touch, express our thoughts at any time, and solve many problems quickly. More often than not, when we call someone about a specific issue, we end up talking and rambling about something else (children, health, sports, etc.) that has nothing to do with the original topic. Besides, email allows us to store and share information, as well as send files as email attachments. You many need to use services like WeTransfer for big files (it allows you to send up to 2GB for free). It is the simplest way to send your files around the world.
Interpersonal face to face communication is healthy and essential for meaningful relationships. It is also sometimes easier and even more effective to explain things in person. Therefore, depending on the issue, the time available, and the context, the need for productivity at a given time, the receiver, etc. we should choose the means of communication that fits us best.