It is difficult to write emails in English. There is no perfect way to write an email. Many people have different ideas on what is the correct way to write an email. In my experience there are two very important parts of an email.
First, I think the most important part is the subject or title of the email. This is the first thing you read when you check your email. It should be short and let the reader know what the email is about.
Second, and the most difficult part, is to keep the email short, simple, and meaningful. Don’t write information that is not important. We all read a lot of email everyday and a long, boring email is never fun to read.
Writing emails in English is a difficult subject. Here are some more links I found on the internet that give very good examples of how to write an email.
https://www.mindtools.com/CommSkll/EmailCommunication.htm
https://business.tutsplus.com/tutorials/write-effective-emails–cms-29621
https://www.thoughtco.com/how-to-write-a-professional-email-1690524
