How to write an email correctly.

Our teacher has said to us to correct three emails and to write another two, in order to improve our writing email's ability. I think that this activity might have been productive, because most of the emails I have written were as the teacher said they weren't correct. Probably it can be something that I will thank in the future when applying for jobs, or writing emails in a company. Before of doing this I didn't know even the half of the mistakes I was doing. It has actually been very helpful.